Closed
Description
Tested versions
- Reproducible in 4.4.1 stable, 4.5 beta 1.
System information
Void #1 SMP PREEMPT_DYNAMIC Sat Jun 21 02:19:00 UTC 2025 on X11 - X11 display driver, Multi-window, 1 monitor - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 970 (nvidia; 570.169) - Intel(R) Core(TM) i5-7600K CPU @ 3.80GHz (4 threads) - 15.50 GiB memory
Issue description
Sun scatter doesn't work if you don't use any of the LIGHTX_* built-ins in the sky shader. I'm assuming this is also why sun scatter doesn't work if you don't assign a sky material to the sky in the environment. My guess is that sun scatter is getting optimized out incorrectly if a LIGHTX_* built-in isn't used. It doesn't even have to be a light which is enabled or exists, just any light.
Steps to reproduce
- Open mrp.
- Uncomment any commented line in the sky shader.