Setting Tint on some meshes' faces seems to be impossible with PBR

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#5,758 5 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
52/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
cpp
Domain
computer-graphics

Research direction

Reproduce the issue using the attached video and the listed steps: attach an affected mesh, select face 1, assign a material, and edit its tint. Trace the mesh-face material and tint editing path to determine why the chosen tint returns to a default value. Done means tint changes persist on affected mesh faces.

Written by the indexing model from the issue text.

Description

bug
Environment

Second Life Release 26.2.0.25021396775 (64bit)
Release Notes

You are at 101.1, 188.8, 22.9 in Jellyfish Aquarium located at simhost-07e5b72529208ad6c.agni
SLURL: https://maps.secondlife.com/secondlife/Jellyfish%20Aquarium/101/189/23
(global coordinates 239205.0, 245693.0, 22.9)
Luau 2026-04-09.24211153544
Release Notes

CPU: Apple M1 Max (2400 MHz)
Memory: 32768 MB
OS Version: macOS 26.3.1 Darwin 25.3.0 Darwin Kernel Version 25.3.0: Wed Jan 28 20:54:46 PST 2026; root:xnu-12377.91.3~2/RELEASE_ARM64_T6000 arm64
Graphics Card Vendor: Apple
Graphics Card: Apple M1 Max

OpenGL Version: 4.1 Metal - 90.5

Window size: 1654x943
Font Size Adjustment: 96pt
UI Scaling: 1
Draw distance: 128m
Bandwidth: 3000kbit/s
LOD factor: 1.375
Render quality: 3
Texture memory: 25559MB
Disk cache: Max size 2150.4 MB (62.3% used)
HiDPI display mode:

J2C Decoder Version: KDU v8.4.1
Audio Driver Version: OpenAL, version 1.1 ALSOFT 1.24.2 / OpenAL Community / OpenAL Soft: OpenAL Soft
Dullahan: 1.24.0.202510081737
CEF: 139.0.40+g465474a+chromium-139.0.7258.139
Chromium: 139.0.7258.139
LibVLC Version: 3.0.21
Voice Server Version: Secondlife WebRTC Gateway

Packets Lost: 2/33188 (0.0%)
May 04 2026 14:25:00

Description

When setting some mesh faces' tint value it seems like it bounces back to some default value.

Reproduction steps

This one is a bit clearer with a video, but:

  1. Attach one of these meshes. (not sure how many it applies to or which)
  2. Right click item -> edit item -> select face
  3. Pick face 1
  4. Set a material (any material should do)
  5. Click "edit selected" next to material
  6. Click the tint color
  7. Try to change the tint

https://github.com/user-attachments/assets/028210ea-873e-49ea-96cf-b1190bdf93c5

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Dominant language
C++
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Forks
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Avg merge
1d 9h
Merged PRs (30d)
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