Day: June 13, 2023

2023 SL SUG meetings week #24 summary

Posted on by Inara Pey
Burrow Wood: Road to Nowhere, April 2023 – blog post †

The following notes were taken from the Tuesday, June 13th Simulator User Group (SUG) meeting. They form a summary of the items discussed and is not intended to be a full transcript. A video of the entire meeting is embedded at the end of the article for those wishing to review the meeting in full – my thanks to Pantera for recording it.

Meeting Overview

  • The Simulator User Group (also referred to by its older name of Server User Group) exists to provide an opportunity for discussion about simulator technology, bugs, and feature ideas.
  • These meetings are conducted (as a rule):
  • They are open to anyone with a concern / interest in the above topics, and form one of a series of regular / semi-regular User Group meetings conducted by Linden Lab.
  • Dates and times of all current meetings can be found on the Second Life Public Calendar, and descriptions of meetings are defined on the SL wiki.

Server Deployments

  • On Tuesday, June 13th:
    • The SLS Main channel servers were updated with a simulator release providing support for the new inventory thumbnails viewer capability soon to be forthcoming. See my recent TPVD meeting summaries for more on this capability. This project – or at least the simulator element – is apparently known as “Manicure” internally at the Lab!).
    • The Preflight RC channel was updated with simulator support for glTF PBR materials – see below for more on this deployment.
  • One Wednesday June14th, the BlueSteel RC channel will be updated with a maintenance release, which include:
    • The “bot detection” update (i.e. AGENT_AUTOMATED constant for llGetAgentInfo() – so only detects if that flag is set, not if an agent is a bot or not.
    • The second part of the LSD rezzing fix + lLinksetDataDeleteFound and llLinksetDataCountFound, among other things.

glTF PBR Simulator Deployment

  • The Preflight channel is a small channel compromising the following controlled access regions: Preflight 0] though Preflight 8, Rumpus Room 1  through Rumpus Room 5 and Testylvania Sandbox.
  • Access to these regions must be requested – but will remain limited; the purpose of this deployment is for small-scale testing of the PBR materials support on the Main grid.
  • A larger, more public deployment of the simulator PBR support code will be forthcoming, so those who do not have access to the Preflight regions should consider waiting for that deployment.

Viewer Updates

No changes to the crop of official viewers for the start of the week, leaving the available list as:

In Brief

PBR Terrain Work

To re-iterate:

  • This work is in development, but is a follow-on to the current PBR Materials project, not a part of it.
  • It is primarily viewer-side changes, allowing the application of PBR materials instead of the current terrain textures. It is *not* PBR terrain painting.
  • Extensions to the project are being discussed internally at the Lab, but the real focus will be on this initial work for the time being, and further information can be found in this official blog post.
  • Discussions on the work are held at the content Creation User Group meetings – see my  meeting summaries or attend the meetings in person.
The PBR terrain project will allow PBR materials to be used on Second Life terrain in place of textures. Credit: Linden Lab

Inventory Thumbnails

  • This is primarily a viewer-side project which keeps coming up for discussion at the SUG meetings.
  • It will allow persistent thumbnail images with a maximum resolution of 256×256 to be produced, which can be stored within inventory with the items they represent  such that they display an image of an item to be displayed on Mouseover.
  • Testing is currently underway to limit the impact the inclusion of thumbnails may have on inventory load time, texture memory use.
  • The viewer is not yet ready for a project viewer release, but the Lab is working on a blog post to outline more of the intended functionality of this capability.

In General

  • BUG-232037 “Avatar Online / Offline Status Not Correctly Updating” has further fixes in the works. No estimated time for deployment.
  • There is still upset circulating about the reduction in Linden Water reflections as a result of performance optimisations to help offset the impact of PBR rendering in the viewer. Currently, there are no plans to offer higher quality reflections in the future, but it is hoped that evolving work on screen space reflections will offset so of the loss of quality.  For discussions on this, please see my Content Creation User Group (CCUG) summaries or attend the meetings in person.
  • A general discussion on updating Linden trees / plants, re-introducing the “wind” to sway trees, how physics calculations and costs are made / arrived at (with the latter noted as potentially being for a future (e.g. not this year) internal discussion at the Lab, so outside of the scope of comment from the La at present).
  • It was noted that there is a further simulator update in development which is hoped will reduce the hit simulators take when handling avatars arriving in a region (and with a focus on better handling of attachments). No ETA on when this will see the light of day.
  • A further discussion on region crossings and vehicles, which also rolled into vehicles hitting ban walls and avatars being ejected / vehicle returned, and a means of preventing this by forewarning on an impending region / parcel with access control enabled. Please refer to the video for all of this.

† The header images included in these summaries are not intended to represent anything discussed at the meetings; they are simply here to avoid a repeated image of a rooftop of people every week. They are taken from my list of region visits, with a link to the post for those interested.