2026 week #16: SUG meeting summary

The following notes were taken from the Tuesday, April 14th, 2026 Simulator User Group (SUG) meeting. These notes form a summary of the items discussed, and are not intended to be a full transcript. They were taken from the video recording by Pantera, embedded at the end of this summary – my thanks to Pantera for providing 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 is held every other Tuesday at 12:00 noon, SLT (holidays, etc., allowing), per the Second Life Public Calendar.
• The “SUG Leviathan Hour” meetings are held on the Tuesdays which do not have a formal SUG meeting, and are chaired by Leviathan Linden. They are more brainstorming / general discussion sessions.
• Meetings are held in text in-world, at this location.

Simulator Deployments

• No SLS Main channel deployments for the week, but the channel was restarted.
• The WebRTC deployment will be expanded to Magnum, finally completing its deployment across all RC channels.
• The next simulator update – Loganberry – will include (among other thinks) the performance improvement work Leviathan has been working on and the fix for avatars remaining a cloud Leviathan has also developed (which addresses causes of clouding on the simulator – viewer-side clouding is not touched).

In Brief

• Leviathan Linden:
  • Has been ” removing use of Tilia (payments system) from our code.” Exactly what this means is unclear, given the use of the Tilia wallet and close ties between LL and Thunes, Tilla’s owners.
  • He has also spent a little bit of time trying to incorporate some suggested code changes for the game_controller code, as suggested by a user, but upon testing he found something isn’t working right, so some investigation is required.
• Rider Linden has been working on viewer code to support the new language definition cap.
• Monty Linden has been working with the Firestorm team on some of the TeleportFinish failure modes. One set of fixes, involving viewers simply walking away from the HTTP connection, is getting improvements so one subset of viewer-side TP/RC issues will be improved.
  • Kyle Linden noted that the SL 26.2 Flat UI Beta (releasing soon) also has a viewer-side TP disconnect fix.
• Harold Linden (SLua):
  • There are a number of crash fixes and minor correctness fixes out on the Aditi (the beta grid), which should be coming to the Lua region on the main grid “soonish”.
  • As Rider mentioned, the scripting language definitions are going to be accessible to the viewer now, so you can always pull down the correct type definitions for whatever region you’re currently on.
  • Harold is additionally generalising his work for making llSetPrimitiveParams less annoying to use. Essentially it’ll be a fluent API where you can batch up prim params commands as you would do currently, but you do it through function calls rather than manually adding a bunch of stuff to a list.
• Kyle Linden indicated there will be a “big push” on Lua documentation in the upcoming week(s).

General Discussion

Please refer to the video below as well.

• It has been again reported that large linksets of prims or meshes that have alpha scripting (LSL and / or Lua) against Blinn Phong materials (apparently PBR is reported as working as expected) for certain parts of that linkset are failing to change alpha state or are slow to change. Copies of suitable linksets / a formal bug report on this were requested.
  • This sparked something of a discussion on probable causes, length of time the bug has been around, means to repo, etc., running through the mid-point of the meeting through to pretty much the end.
  • As a part of the discussion llSetLinkGLTFOverrides fails to clear alpha override was raised. No updates were given.
• A WebRTC question was asked: the current settings seem to be 60m range, no distance attenuation. Is that the only option available?
  • Response: there should be distance attenuation. The curve is different than Vivox, though. If you’re not experiencing any distance attenuation, bug fixes are required with more details so LL can try to replicate what you’re doing.

Date of Next Meetings

• Leviathan Linden: Tuesday, April 21st 2026.
• Formal SUG meeting: Tuesday, April 28th, 2026.

† 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.