Hello everybody,
I'm having a problem I hope someone can help with. You can see it easily in the image provided.
On the left and right is the mountain as we expected to see it, in the middle is a slice that rendered out dark for some reason. All are from the same project file, with the only difference being which machine rendered the slice on the farm.
This image was rendered on our render farm, with an animated Crop region to split the image into slices per frame. This is not the only slice that rendered dark.
The dark slice was rendered on a slave with 8 CPU's and taking 1h21m to render, which is about what we expected for render time.
The slices on the left and right were rendered on 24 CPU machines.
The 8 CPU machines don't always render dark, these two just happened to have been rendered on those.
It was resubmitted twice, each time that slice rendered dark. I didn't record what machine rendered those previous also dark slices.
Has anybody run into this problem before and know how to fix it? Any help would be greatly appreciated.
- Lorenzo
It looks like it is the Enviro Light / GI contribution.
I would try the following:
Ensure that GI sample quality is at least 10.
GI relative detail 1 (to keep render times down)
GI blur radius 40.
Advanced tab -> GI prepass padding 1.
Advanced tab -> Ray detail region "Detail in camera" (so that each crop is reflecting the same set of geometry)
There may still be some slight differences, after all that. It might be better to have some small amount of overlap so that you can blend when stitching, maybe 10% of the total image width.
Matt
Thank you Matt! Those GI settings worked perfectly, no more dark slices. :)
- Lorenzo