This is because macosx mono is 32-bit and this can't p/invoke 64-bit binaries.
However, the reverse is also true.
If OpenSimulator stops working for you then please complain! Long term alternative is probably to build a fat binary with both architectures.
This retrieves and caches information from the PresenceService to only send messages to online users.
This is reported to much improve performance for large groups where most users are offline.
Cache is 20 seconds to balance requests against users not receiving messages until cache updates.
This is an alternative to an approach where login/logout notification is sent directly from simulator to groups service.
However, I'm not convinced that this PresenceService approach is actually better. Needs more thought.
Even when an avatar is standing still, it's sending in a constant stream of AgentUpdate packets that the client creates new UDPPacketBuffer objects to handle.
This option pools those objects. This reduces memory churn.
Currently off by default. Works but the scope can be expanded.
We can provide modular ini for connectors...
look for our configuration in the following places...
1) in the default ini/-inifile
2) in the named file (ConfigName) located in the configured directory
(see Robust[.HG].ini [Start] section for ConfigDirectory)
3) in the repository named in the connector (ConfigURL)
In this case, the file will be written into the configured
directory with the specified
See example connector/service @ https://github.com/BlueWall/SlipStream
for testing.
Rearrangement and cleanup of shape collection code. Much more readable.
Enabling and use of collision filters and masks.
Addition of ID to body creation BulletSimAPI calls so always set in
shape for collision reporting.
Change default of ShouldSplitSimulationIslands and ShouldRandomizeSolverOrder
from 'false' to 'true'. When 'false', this suppresses NO_CONTACT_RESPONSE
which makes volume detect fail.
This controls how many undo steps the simulator will store for each prim.
Default is now 20 rather than 5 as it briefly was.
The default number could be increased through this is a memory tradeoff which will scale with the number of prims in the sim and level of activity.
This resends appearance uuids to avatars in the scene once a minute.
I have seen this help in the past resolve grey appearance problems where viewers have for unknown reasons sometimes ignored the packet.
The overhead is very small since only the UUIDs are sent - the viewer then requests the texture only if it does not have it cached.
This setting will not help with cloudy avatars which are usually due to the viewer not uploading baked texture data or uploading something that isn't valid JPEG2000
This is because libopenjpeg 1.5 appears to require a minimum of glibc 2.14, whereas at least one fairly recent distro (openSUSE 11.4 from 2011-03-10) only has glibc
Further investigation pending.
Among other things this allows pCampbot to work under Windows since libopenmateverse now ships the same log4net.dll (publicly signed) as OpenSimulator
This also updates the libopenmetaverse embedded libopenjpeg from 1.3 to 1.5.
DLL naming and mapping for non-Windows libopenjpeg changes to remove version number to make future udpates easier and bring it into line with names of other shipped DLLs.
libopenjpeg updates have been made for OSX, Windows (32 and 64 bit) and Linux (32 and 64 bit). Please report any issues.
Fix inconsistencies between configuration parameter names and their description names. Changing the configuration parameters for non physical prim size min-max from Nonphys* to NonPhys*.
Please update your OpenSim.ini and Regions.ini to reflect these changes.
This is to resolve a problem where an asset marked as local but not temporary but still used in the scene would be removed.
The timed expiry scan no longer tries to refetch assets from the scene that are not currently in the cache - this is not helpful since it just drags a lot of data into the cache that may never be referenced.
This removes the DeepScanBeforePurge option since setting this to false will introduce the above problem. This previously had a default of true.
Viewer LL 3.3.4 and before sometimes fail to properly redisplay dynamic textures that have a small data length compared to pixel size when pulled from cache.
This appears to happen when the data length is smaller than the estimate discard level 2 size the viewer uses when making this GetTexture request.
This commit works around this by always regenerating dynamic textures that fall below this threshold rather than reusing them if ReuseDynamicTextures = true
This can be controlled by the [Textures] ReuseDynamicLowDataTextures config setting which defaults to false.
If true, this setting reuses dynamically generated textures (i.e. created through osSetDynamicTextureData() and similar OSSL functions) where possible rather than always regenerating them.
This results in much quicker updates viewer-side but may bloat the asset cache (though this is fixable).
Also, sometimes issue have been seen where dynamic textures do not transfer to the viewer properly (permanently blurry).
If this happens and that flag is set then they are not regenerated, the viewer has to clear cache or wait for 24 hours before all cached uuids are invalidated.
CUrrently experimental. Default is false, as before.
This is necessary because commit 8131a24 (Tue Mar 27 10:08:13 2012) started passing the config section name rather than hardcoding "AssetService"
This meant that the HG external-facing asset service tried to read ConnectionString from [HGAssetService] rather than [AssetService].
On SQLite, not finding this meant that it fell back to [DatabaseService], which is set for OpenSim.db rather than Asset.db.
Therefore, all external asset requests returned null.
Solution taken here is to create an [HGAssetService] section with the same ConnectionString as [AssetService].
This bug does not affect normal MySQL/MSSQL config since they use the [DatabaseService] connection string anyway.
Addresses http://opensimulator.org/mantis/view.php?id=6200, many thanks to DanBanner for identifying the exact problem commit which was very helpful.
This was a regression from OpenSimulator 0.7.3.1 which did not contain this bug.
This also fixes computation of avatar mass.
Added parameter MaxPersistantManifoldPoolSize.
Fixed a parameter setting bug which caused crashes of there were
more than 400 or so physical objects. I tested up to 5000.
Updated BulletSim DLLs and SOs.
Add description and default of false (as before) to OpenSimDefaults.ini
If set to true, this config switch will resend avatar appearance information (a small amount of UUID data, not the baked textures themselves) to other avatars in the sim every 60 seconds.
For me, this has helped with situations where avatars appear persistently grey - the LL viewer sometimes did not appear to request assets the first time the appearance data was sent.
However, this switch will not help with other appearance failure situations (e.g. failure to bake assets).
This setting is experimental but will not have any significant impact on the simulator if turned to true.
This is to try and resolve a strange Initialization exception for the AppearanceManager type that only occurs on Windows 64 bit (not Windows 32 bit or Linux!)
Built from https://github.com/openmetaversefoundation/libopenmetaverse/commits/master
This update incorporates a fix by Melanie in libomv where textures would sometimes rotate slightly when other properties were changed.
Hence addresses http://opensimulator.org/mantis/view.php?id=6100
This update also incorporates libomv bot code updates that significantly reduce the warning spam for pCampbot.
The change rate of libomv is low and many changes refer to bot or code not used by OpenSimulator, so I think it is sufficiently stable to use evne though it's not a release.
and into its own class. The BulletSim data structures track
individual prims as linksets of 1 so most of the prim code is not
different between a linked and unlinked object.
Only files ending in .ini and .xml are actually loaded.
Also improves the help at the top of Regions.ini.example to mention that OpenSimulator would generate Regions.ini anyway on first startup.
Also changes separator from comma to bar to match existing [LoginService] config features.
Divergence of config names for identical facilities in different places makes for an unnecessarily confusing user experience.
This is to provide an indication of what's happening now that the default isn't to report every single script start.
Changes XEngine logging level in OpenSim.exe.config from WARN to INFO.
This is to reduce log spam from script loading, which is especially spammy for avatar movements with scripted attachments.
All important messages are at warn or above.
If you still want/need to see these messages, set <level value="DEBUG"/> in the <logger name="OpenSim.Region.ScriptEngine.XEngine"> section of OpenSim.exe.config.
This affects no other package logs, which still output at the root configured level (currently DEBUG by default).
The packet was actually being handled but not acted on.
This change extends the default timeout for paused clients to 5 minutes
and makes both the paused and non-paused timeout periods configurable.
If active, the physics module can return arbitrary stat counters that can be seen via the MonitoringModule
(http://opensimulator.org/wiki/Monitoring_Module)
This is only active in OdeScene if collect_stats = true in [ODEPhysicsSettings].
This patch allows OdeScene to collect elapsed time information for calls to the ODE native collision methods to assess what proportion of time this takes compared to total physics processing.
This data is returned as ODENativeCollisionFrameMS in the monitoring module, updated every 3 seconds.
The performance effect of collecting stats is probably extremely minor, dwarfed by the rest of the physics code.
Without this, LL 3.3.1 continually pushes LLInventoryModelFetchDescendentsResponder::error 499 to its log.
This cap will be ignored by older viewers - UDP inventory will work normally.
This is because the viewer doesn't receive a timezone from the server but bases its displays on Pacific Standard Time.
However, it still expects to receive notification from the server as to whether or not Daylight Savings Time for PST is in operation.
This commit introduces a new DSTZone setting in the [LoginService] config setting that accepts a list of timezone names valid across different platforms to calculate Pacific DST.
If you need the old behaviour of calculating DST based on the local timezone of the server running the login service, then please override DSTZone with "local".
A mailing list announcement will be made later.
Thanks to Olivier Van Helden and Gudule Lapointe for determining this behaviour and providing this patch.
From http://opensimulator.org/mantis/view.php?id=5972
folder when deleting objects from a scene. The use of the trash
folder causes assets to be created and stored everytime you delete
an object from the scene (slows down the delete and adds mostly useless
assets to your database).
Default is on (use the trash folder) which is the standard behavior.
Value for this setting in OpenSimDefaults.ini (1000) is same as setting in code (1000) so this should have no effect
Thanks to Ovi Chris Rouly for pointing this out.
The asset data plugin now implements IXAssetData rather than IAssetData so the ordinary AssetService should no longer pick it up.
This replaces the changes in 92b1ade. There is no longer any need to adjust your StandaloneCommon.ini/Robust.ini/Robust.HG.ini files.
This may explain very recent issues in the last few weeks where textures have been disappearing or turning white (as they were going to different places).
Unfortunately, you will need to rollback to an earlier database backup or reupload the textures.
People using standalone in master, please update your StandaloneCommon.ini according to this change.
People using robust in master, please update your Robust.HG.ini.example[.HG].ini according to this change.
It would certainly be nice to change the default script on disk, but this is currently unused and isn't a suitable default.
At this location it would also stop an easy manual deletion of script engine compiles and state.
This is configured in the new [Estates] section of OpenSim.ini.
If a default estate is configured then all new regions are automatically joined to it instead of asking the user.
If the default estate does not already exist then it is created.
Current default behaviour remains the same - the user is asked for estate details when necessary.
Thanks to Frenando Oliveira for the patch which I adapated further.
In this zip, it's called System.Data.SQLite.dll. We rename it to lib64/sqlite3.dll
This is a little unexpected but it works. For some reason my hand-rolled one in Visual Studio 2008 did not.
This is sqlite 3.7.10. Other libraries are still currently 3.7.6 but this should make no difference.
This should make it possible to use OpenSim.exe on 64-bit Windows now, though currently the bullet physics plugin will still complain (can be ignored if you are not using bullet).
In over 4 years this never progressed beyond an unimplemented stub.
This doesn't mean that it can't come back if someone is interested in implementing PhysX support.
In theory, this means that a 64-bit Windows OS user can now run OpenSim.exe with ODE and use more than 2 (or 3) GB of memory.
However, this is completely untested since I don't currently own a 64-bit Windows box. Feedback appreciated.
Using OpenSim.32BitLaunch.exe should continue to work. Other platforms are unaffected.
This will currently not work with sqlite - I will add that too if this works.
If velocity reaches 256 in any vector then bad things happen with ODE, so we now clamp this value.
In addition, a falling avatar is clamped by default at 54 m/s, which is the same as a falling skydiver.
This also appears to be the value used on the linden lab grid.
This should resolve http://opensimulator.org/mantis/view.php?id=5882
These can be run using the "nant torture" target. They are not part of "nant test" due to their long-run future nature.
Such tests are designed to do some testing of extreme situations and give some feedback on memory usage, etc.
However, data can be inconsistent due to different machine circumstances and virtual machine actions.
This area is under development.
This reverts commit 4eef6725f4.
Reverting for now since this fails with "terminate called after throwing an instance of 'std::bad_alloc'" on Wright Plaza instances.
The osGetGrid**** functions will now get the grid settings from the GridInfoService. Set the GridInfoURI in your ./bin/config-include/GridCommon.ini [GridInfo] section.
As discussed on the opensim-dev mailing list, this is to avoid a demonstrated ODE collider segfault when stress-testing a simulator running more than one region using the bundled pCampbot.exe
As before, the ODE revision used is r1755 - only the collider has changed.
Tests so far reveal little performance change.
However, if noticeable issues do arise, please report on mantis and/or the opensim-dev mailing list.
The previous libraries are temporarily in bin/Physics-previous-ode-libs
These can be copied back to bin if one wants to compare behaviour with the previous libraries.
Add configuration option - DEBUG to enable debugging methods. This is temporary for helping users testing teleport routing be able to report back the data with the test cases. We can remove when finished with this, or leave it if it proves to be useful.
Users: set DEBUG = true in OpenSim.ini to get more information from teleport routing. The default is false. It presently prints the TeleportFlags value.
Naturally, default is true.
When set to false, "phantom" flags on prims can be set as usual but all prims remain phantom.
This setting is for test purposes.
This switch does not affect the collision of avatars with the terrain.
Enabling this by setting Cap_FetchInventoryDescendents2 = "localhost" in the [ClientStack.LindenCaps] section of OpenSim.ini downloads inventory via http rather than udp in later viewers.
This will hopefully address mantis 5471, 5694 and 5718.
This code is now in opensim-libs, along with Diva's slightly older patches (which were already applied to the DLLs in the opensim tree).
Thanks Oren!
From field experience, we know that simulators can be unstable if a user logs in before the scripts have finished loading.
This commit turns login_disable = true in [RegionReady] on by default which prevents this from happening.
If you want the old behaviour, please copy these section from OpenSimDefaults.ini into OpenSim.ini and set login_disable = false
This is to allow broader subsitution in the future. Currently, the only substitions are \R (for region name) and \\ (for a single backslash)
e.g. "Region (\R) " is the current and continuing default prompt
This renames custom_prompt in [Startup] to ConsolePrompt
PARCEL_GROUP, PARCEL_OWNER, ESTATE_MANAGER and REGION_OWNER can be combined with the existing agent uuid option to limit ossl functions to agents and owner classes.
Signed-off-by: BlueWall <jamesh@bluewallgroup.com>
These are disabled by default, as before. Please only turn these on in secure grids, since they allow the same facilities as the existing SetPassword call (also disabled by default)
These facilities can be helpful when integrating external systems, in addition to the existing option of adapting an IAuthenticationService or using WebLoginKey
This is to make it easier to change all these names at once, where all grids services are running from the same location.
Also rearranges some lines in [Modules] so that StandaloneCommon.ini.example and GridCommon.ini.exmaple are consistent.
This is switched on by setting AllowSetPassword = true in the [AuthenticationService] section of Robust.ini or Robust.HG.ini
Default is false as before.
Default is false, as before.
Enabling AllowCreateUser in [UserAccountService] for ROBUST allows avatars to be created via an http call, with viewer 2 appropriate bits and pieces.
Only Ruths can be created at present.
Please don't rely on the config since at some point CreateUser will be moved to a separate co-ordinating service.
As discussed in http://lists.berlios.de/pipermail/opensim-dev/2011-October/010599.html and the preceeding thread mails,
the aim of this setting is to avoid overloading the viewer UDP connection where the client is failing to ack packets.
Please mantis any anomalous viewer connection behaviour which wasn't there before.
This had stopped working. However, at the moment it still allows the physics flag to be set even though this has no effect. This needs to be fixed.
Default for this flag is true as previously.
This exactly fits five ODE steps in the default frame time (0.089).
This means that ODE execution time now matches the default minimum frame time.
This eliminates errors between distance travelled as calculated by ODE in clear air and simple extrapolation.
On the old values, ODE would actually do calculations over 0.1 seconds rather than 0.089.
This means that once the avatar is at top speed, no additional packets need to be sent for smooth movement, since no error develops between server and viewer.
This approach replaces the tweaks previously discussed on the opensim-dev mailing list
Settings are at bottom of [Startup] in OpenSimDefaults.ini, override in OpenSim.ini to change
Defaults are the same as previously.
More information to come on opensim-dev shortly.
Feel free to tweak but if you do please don't expect any support unless feedback on certain tweaks is explicitly requested.
Also adds password check to some functions where this was missing and fixes some parameter checking.
This is a patch from http://opensimulator.org/mantis/view.php?id=5715 with a few small unrelated spacing tweaks from me.
Thanks Michelle Argus.
I added the boolean config setting "allow_regionless", defaulting to false. If set to true, opensim will start up ok if no region configurations are found in the specified region_info_source. It will not ask the user to create a region.
This reverts commit 44a491f36b.
This makes packaging OpenSim slightly easier but then generates a FriendsConnector error if naively used after compilation.
So let's revert to stick with the "DataStore" error for now - at least that's a known error.
I must have had it cached last night.
This now makes completely fresh avatar setups appear properly (remember to wipe viewer cache and server cache as well as database).
As a bonus, eyes now appear by default too!
This is controlled by the CreateDefaultAvatarEntries switch in the [UserAccountService] section of config-include/Stnadalone.ini
This is left as false in grid mode
Viewer 2 no longer contains the default avatar assets (i.e. "Ruth") that would appear if the user had insufficient body part/clothing entries.
Instead, avatars always appear as a cloud, which is a very bad experience for out-of-the-box OpenSim.
Default is currently off. My intention is to switch it on for standalone shortly.
This is not particularly flexible as "Ruth" is hardcoded, but this can change in the future, in co-ordination with the existing RemoteAdmin capabilities.
Need to fix creation of suitable entries for users created as estate owners on standalone.
Avatars still appear with spooky empty eyes, need to see if we can address this.
This commit adds a "Default Iris" to the library (thanks to Eirynne Sieyes from http://opensimulator.org/mantis/view.php?id=1461) which can be used.
This matches the GridCommon setting and is the best tested setting. It appears to work fine on standalone.
Also, add information that the flotsam asset cache is the recommended cache, since it is most used and actively maintained.
Had to stop using AvatarService for now since it doesn't store baked texture IDs (which is why this was failing).
Also failing because cloning appearance was also cloning the AvatarApperance.Owner field, which we weren't then changing.
Extended TestCreate() to check this.
When this setting is false and other defaults haven't been changed, scripts entering the simulator from another sim are automatically restarted but their state is not preserved.
When this setting is true, state that accompanies the script is reloaded (e.g. if a script had a variable i = 1 when leaving the source region, it will still have i = 1 on the destination region).
This setting does not affect crossings when regions are run in the same simulator. In this case, state is already preserved.
Some items had completely wrong permissions - this is easier than correcting them all.
The ability to set permissions in xml is retained since there are use cases for this (e.g. to create no-mod library scripts)
Library items always need the same permissions, so it doesn't make sense to load them from the xml files. This just opens the door to permissions mistakes.
This matches the ability to disable the memory part
This is controlled through the FileCacheEnabled parameter in FlotsamCache.ini
Default is true, so existing installations are not affected.
Improved fcache command feedback when various caches are disabled.
Re-enabled test for flotsam cache with file caching disabled.
Instead of performing the 4096 check when the region is linked (and subsequently removing the link), leave the link in place and perform the check in the entity transfer module
This allows us to explicitly tell the hypergridder why the teleport failed (region out of range).
It also allows people on regions that are within range (on a large source grid) to teleport.
The Check4096 config parameter in the [GridService] section is replaced by a max_distance paramter in a new [EntityTransfer] section in OpenSimDefaults.ini
Since the parameter is in OpenSimDefaults.ini no action needs to be taken unless you want to increase this limit. It could also be decreased.
The check is being made in the base entity transfer module, since I believe the viewer problem occurs both on extremely large grids and while hypergridding.
Changed the experimental capability introduced a couple of commits ago: now sending that extra information as part of the response in the SimulatorFeatures cap.
For the most part, defaults are made to match those already in FlotsamCache.ini.example.
The one exception is that the 48 hour file timeout from the code is used instead of the 0 hours that was in the example file. This can be tweaked if necessary.
Most importantly, the default cache directory is now ./assetcache (as in FlotsamCache.ini.example) rather than ./FlotsamAssetCache (as was the internal code default).
Therefore, if you were using flotasm without using the config file, then please rename your cache directory or start using the ini file and change the default there if you want to keep using your existing cache.
this is a prerequisite to fixing llDialog issues for the latest Linden viewers, since they are now making use of a new OwnerData field in the ScriptDialog message
It appears that if the viewer requests a folder containing links, we must also send the folders that contain the link targets first.
This was tested with Kokua 0.1.0 WIP though I predict it will also work with other viewer 2s
This is to facilitate running Freeswitch in a separate ROBUST shell, as on grid setups there can be quite a lot of traffic flowing between FreeSWITCH and ROBUST. However, running in a spearate shell is not mandatory.
limits because the only ones used now are the defaults (which are overwritten
by the client throttles anyway). Updated the default rates to correspond to
about 350kbps.
Also added a configuration to disable adaptive throttle. The default
is the previous behavior (no adaptation).
This brings it into line with the Windows and Linux libraries.
This is a universal dylib with x86_64, i386 and ppc parts. However, even on a 64 bit Intel machine Mono can only P/INVOKE the i386 version right now. ppc is untested.
The configuration used to compile was
CFLAGS="-g -O2 -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -arch ppc" CXXFLAGS="-g -O2 -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -arch ppc" LDFLAGS="-arch i386 -arch x86_64 -arch ppc" ./configure --enable-old-trimesh --disable-asserts --enable-shared --disable-dependency-tracking --disable-demos --without-x
--disable-demos --without-x is required to build ODE on Mac OS X
CFLAGS, CXXFLAGS and --disable-dependency-tracking are necessary to build the universal dylib (some compilation lines use CFLAGS instead of CXXFLAGS)
The other settings are tweaks for using ODE with OpenSim
This means that Mac OS X users can now use the standard sqlite adaptor instead of the legacy one.
This is SQLite 3.7.5. I configured the build with the line
CFLAGS="-Os -g -isysroot /Developer/SDKs/MacOSX10.6.sdk -arch i386 -arch x86_64 -arch ppc7400 -DSQLITE_ENABLE_COLUMN_METADATA" LDFLAGS="-arch i386 -arch x86_64 -arch ppc7400" ./configure --disable-dependency-tracking
The SQLITE_ENABLE_COLUMN_METADATA flag exports the metadata symbols that modern Mono SQLite adaptors need.
The -Os removes debugging symbols (as per the sqlite3 source pkg README)
The other parts are to cross compile for x86_64, i386 and ppc. On Mac OS X, Mono can actually only P/INVOKE 32-bit libraries even on 64 bit platforms so i386 is being used. The dylib has not been tested on ppc.
Apply the same change to both the 32-bit and 64-bit DLL target paths. This makes the previous addition to the instructions in the README for running on Linux unnecessary.
This version fixes a bug so that MySqlCommand.CommandTimeout = 0 now correctly sets an infinite command timeout. This might help with failures on long-running migrations.
The mysql.data.dll v2 is used from the mysql package (as opposed to v4). The v4 version (probably standing for NET 4.0) does not work under mono 2.6.7, which is still commonly used.
child agents in neighbor regions. This means you can extend
the view on a simulator beyond the default 3x3 regions.
This uses a region default draw distance and should be
replaced at some point by the avatar specified draw distance.
That will require more careful, dynamic recomputation of child
agents every time the draw distance changes.
WARNING: this is experimental and has known instabilities. specifically
all regions "within site" should be running the same default draw distance
or agents will not be closed correctly.
This matches the behaviour for other deletions and stops this operation failing on Windows .NET (though mono is fine with the duplication).
Probably a holdover from copying code from the older legacy adaptor.
Resolves http://opensimulator.org/mantis/view.php?id=5361
Made FireAndForgetWrapper a singleton class to allow us to drop
dependancy on the BclExtras35 library. BclExtras is broken in
Mono 2.8.2 and we used the library in only one function.
Frontend into a separate region module. Configuration
settings added to the defaults ini file. Others may find
this useful for pushing map tiles to a separate server.
Change the remote Grid region module so that it takes the network connector as a config variable. This allows the region plugin to be reused for both Robust and Simian network connectors.
Configuration option AssetService in section [GridService] must be set to enable this functionality.
Map tiles do currently not show for hyperlinks set in simulators that are connected to grids, see Mantis #5270.
the same thing was actually done for ode.dll a couple of commits ago but I got the commit msg wrong (should have been r1755, not r1754). Damn these fat fingers.
This revision dates from 02 Sep 2010 and has received some testing. This code will be updated in the opensim-libs repository
Updates for libode-x86_64, ode.dll and libode.dylib will follow
WARNING!!! This changes a default. The old default is to allow multiple
presences, the new default disables this. As the feature currently has no users,
this should not present any difficulty and will alleviate the presence
issues somewhat.
This will cause visual params to be persisted along with worn items. With
this, alpha and tattoo laters will be saved. Multiple layers MAY work, but
not tested because I don't use Viewer 2.
Justin Clark-Casey (justincc)