LuxCoreRender
Persistent Cache: Inconsistent Renderings
Report carried over from the Forums: https://forums.luxcorerender.org/viewtopic.php?t=6681
When rendering a series of images using peristent cache, it has been observed that the result can vary from rendering to rendering. As opposed to the forums thread title, this is not limited to animations, but is observed when rendering the same image multiple times. Scene files for use with e.g. LuxcoreUI attached,
animPhotonGICacheFlickering.zip
The author reported three different results, which I could reproduce.
Two suspicions have so far come up:
- Loading the stored
.pgifile is inconsistent. - The culprit leading to the different results is actually the tonemapper.
In my tests, I extracted the attached zip-file twice and rendered from fresh. The first attempt, there the .pgi-file is generated, produced different results both times.
This might rule out the loading-step as the problem.
The issue is not new, apparently. Previous reports are linked within the forums thread cited above.
Update, the reason for the major variations seems to have been found, see here: https://forums.luxcorerender.org/viewtopic.php?p=36808#p36808
Waiting for a PR to merge into for_v2.11 and bugfix_2.10 branches.
General issue of flickering with caches still remains. Will leave this issue to document further findings, ToDos etc.
I have recently merged this into the branches mentioned above: https://github.com/LuxCoreRender/LuxCore/commit/49f9b7806af504e4292189a3e1a94b7040a6bd8f https://github.com/LuxCoreRender/LuxCore/commit/e7d3f53d9b2041c2e87c57cb7087f86f52ee6a8e