2018 SL UG updates #34/2: CCUG summary with audio

“That’s no moon…” – Rider Linden teases with possibilities whilst talking Environmental Enhancement Project (EEP). Credit: Rider Linden

The following notes are taken from the Content Creation User Group (CCUG) meeting, held on  Thursday, August 23rd, 2018 at 13:00 SLT.  These meetings are chaired by Vir Linden, and agenda notes, meeting SLurl, etc, are usually available on the Content Creation User Group wiki page.

The choppiness in some of the audio segments where Vir’s voice drops out is due to issues with SL Voice.


Project Summary

The goal of this project is to provide a means of animating rigged mesh objects using the avatar skeleton, in whole or in part, to provide things like independently moveable pets / creatures, and animated scenery features via scripted animation. It involves both viewer and server-side changes.


Release Candidate Viewer

As noted in my Simulator User Group updates and Viewer Release summaries, the Animesh viewer was promoted to release candidate status in week #33 with the release of version on August 13th, 2018. The three key points of this are that:

  • Animesh is one step away from being the de facto viewer release – although this is dependent on a range of factors, including the other RC viewer in the pipeline, the viewer’s performance whilst at RC, etc.
  • Animesh capabilities will now naturally be available more widely among users of the official viewer.
  • Third-party viewers are now officially allowed to incorporate Animesh in their offerings.


Animesh has been on general release server-side across the grid for the last couple of weeks, and thus far, no problems have surfaced with in. However, this could be due to a relatively low usage of the capability up until now, given it has only be available within project viewers.

Sample Content Rotation

As noted in past CCUG summaries and updates in these pages, a  workaround for rotation issue with uploaded models now means that some of the Animesh sample content provided by the Lab – such as the raptors used in the GIF file I often use to banner these reports – now crab sideways rather than walking forward when seen in the Animesh viewer.  Following a suggestion put forward at the meeting, Vir is going to see if the affected content can be updated so that it moves correctly and can be provided as samples for people wanting to play with Animesh without potentially confusing them.

It’s also been pointed out that the scripts used within the sample content are very specific to that content, and so could lead to problems if people try to pull the scripts and use them as templates. However, Vir is uncertain as to how generic the scripts can be made in order for them to work as templates.


There are still a number of bugs the Lab is working on in relation to Animesh. These should be listed in the JIRA filter (link above), and are related to some Animesh editing issues, animation stop / restart issues, and some lagging, possibly due to the underlying skeleton lagging behind the animation playback (so the Animesh isn’t properly oriented as an animation starts to play, for example). Not all of these issues may be fixed before Animesh reaches de facto release status, but Vir is continuing to try to work through them.

Environment Enhancement Project (EEP)

Project Summary

A set of environmental enhancements, including:

  • The ability for region / parcel owners to define the environment (sky, sun, moon, clouds, water settings) at the parcel level.
  • New environment asset types (Sky, Water, Days that can be stored in inventory and traded through the Marketplace / exchanged with others.
    • Day assets can include four Sky “tracks” defined by height: ground level (which includes altitudes up to 1,000m) and (optionally) 1,000m and above; 2,000m and above and 3,000m and above, plus a Water “track”.
  • Experience-based environment functions
  • An extended day cycle (e.g a 24/7 cycle) and extended environmental parameters.
  • There are no EEP parameters for manipulating the SL wind.
  • EPP will also include some rendering enhancements  and new shaders as well (being developed by Graham Linden), which will allow for effects such as crepuscular rays (“God rays”)
    • These will be an atmospheric effect, not any kind of object or asset or XML handler.
  • The new LSL functions for finding the time of day according to the position of the windlight Sun or Moon have been completed,and are more accurate than the current options.
  • EEP will not include things like rain or snow.
  • It will still be possible to set windlight local to your own viewer.


Current Status

Alex Linden from the product team has been working on internal testing with Rider, and is now in the process of moving the pieces into place to have EEP deployed the Aditi (the beta grid).  Rider believes that a project viewer should be surfacing “very, very soon” as a result.  The plans for the project viewer are:

    • Get the assets support in to the first release.
    • Hopefully include crepuscular rays (“Godrays”) and work on shaders for distance fogging and atmospheric density in the first release of the project viewer as well. However, as these are in fact another shader, they may not make it into the initial cure of the project viewer, depending on how things go.
    • Add the scripted ability to manipulate EEP assets at a later date, but before the viewer progress to RC status.

As well as discussing project progress, Alexa and Rider also indicated some of the things they’ve been playing around with while testing EEP.

Cthulhu the sun, Cthulhu the sun / And I say it’s all right – as the Beatles never sang: Rider Linden has fun with EEP. Credit: Rider Linden

Bakes On Mesh

Project Summary

Extending the current avatar baking service to allow wearable textures (skins, tattoos, clothing) to be applied directly to mesh bodies as well as system avatars. This involves server-side changes, including updating the baking service to support 1024×1024 textures, and may in time lead to a reduction in the complexity of mesh avatar bodies and heads.

This work does not include normal or specular map support, as these are not part of the existing Bake  Service.


Current Status

Still awaiting the AIS updates (see below). Once these are in place there are a couple of other back-end pieces that require putting into place.

AIS Update

Both EEP and Bakes on Mesh are awaiting a AIS (Advanced Inventory System) update that will provide the necessary back-end support for both projects on Agni (and Main grid), as each is adding new inventory asset types to Second Life. Currently, it is believed that the work on support for Bakes on Mesh is a little further along to allow it to take advantage of the AIS update, and the latter may start being deployed in week #35 (commencing Monday, August 27th, 2018).

In Brief

  • In-world meshes bigger than 64m on an axis: there are no current plans to allow the upload of in-world meshes that exceed the 64m limit.  The main reasons for this are:
    • Vertex resolution: the larger the object, the greater the distance each vertex integer has to span, leading to inaccuracies in positioning (think prim drift for mesh), together with resolution degradation.
    • More particularly, the griefing potential and possible performance issues (e.g. rendering load on the viewer and possible implications for the physics engine).
  • Sim surrounds: partially in line with the above (and also ARCTan, below, given the use of sculpts), the Lab is interested in learning more above how people might like sim surrounds to be addressed. Some ideas offered include: making surrounds a specific form of large mesh with physics automatically disabled at upload (possibly used with a special field within the Estate / Region floater they can be “dropped into” to be applied; continuing with sculpts (with their 1 LI advantage over other potential land impact loads & their potential to have a relatively low number of vertices and thus form relatively economical content).
  • Project ARCTan: the project to recalculate object and avatar complexity will be progressing, however, it involves input from Graham Linden, who is currently focused on the shader / rendering work for EEP.   However, data collection is continuing.
    • People are starting to question what this will mean for sculpt(ie)s in SL – the majority of which tend to be horribly inefficient in terms of rendering. The short answer to this at the moment is the overall impact hasn’t been determined.
  • Real-Time bounding box tracking: the question was asked whether the new bounding box calculations introduced as a part of Animesh will include “unused” joints (e.g. if the hind legs in the skeleton are not rigged to, are they included in the bounding box calculations?). short answer: no; with the exception of the original (pre-Bento) base skeleton joints (as used by the system avatar).
  • Next Meeting:  Thursday, August 30th, 2018.