Photon Map Final Gathering goes bad and have unstable result

Component:YafaRay Core
Category:bug report
Assigned:David Bluecame

3.1.1 beta

Blender 2.78a

When Final Gathering is O, It gives different results after same settings. Dark, or bright.

i.e 5000 photons, R=0.25, Search=100, bounces=6, samples=16

And result randomly chages: can be brighter with lower samples and higher photons. Or darker with same settings.

Radiance map is ok, and chaging with quantity of photons, so something with FG.

1st try.png794.23 KB
2nd try.png144.18 KB
3rd try.png130.09 KB



Component:Blender Exporter» Code
Assigned to:Anonymous» David Bluecame

Please can you attach the blender scene compressed in zip? Thanks!


Status:active» needs more infos


Please I need a more clear description of the problem and an example scene showing the problem.

Without a clear understanding on what the problem is there is not much I can do. If I don't get more details/examples in 2 weeks, I will close this case.


Priority:normal» minor
Status:needs more infos» by design


I've been able to replicate this, but I don't think this is a real problem. Final Gather uses a random function that could give you different results every time if you use too few photons. Increase the number of photons to something like 50,000 or 500,000 for example and the FG will give more similar results every time.

If no further comments appear in a week or two, I will close this case.


Status:by design» closed