Lighting / Shading error
polycounter lvl 5
Hi, I have a lighting issue within marmoset.
At first I thought I might have a problem with my normal smoothing or my normal map so I rebaked everything, but that doesn't seem to be the case.
Here is my low poly model (with smoothed normals) and the normal map in maya. As you can see, everything looks fine:
Once I import the model in marmoset, here's what I have though:
As you can see, I have huge artifacts. And it looks like the shadows are conforming to the low poly model even when the normal map is applied.
Also, the problem goes away if I turn off the "cast shadows" in the light options:
Is that a known issue? Is there any way to fix it?
I tried to install the latest drivers for my gtx580 (in case the problem would come from there), but that didn't solve my issue either.
I'm out of idea, so I would greatly appreciate your help since I'd like to do my final render in marmoset. :poly122:
At first I thought I might have a problem with my normal smoothing or my normal map so I rebaked everything, but that doesn't seem to be the case.
Here is my low poly model (with smoothed normals) and the normal map in maya. As you can see, everything looks fine:
Once I import the model in marmoset, here's what I have though:
As you can see, I have huge artifacts. And it looks like the shadows are conforming to the low poly model even when the normal map is applied.
Also, the problem goes away if I turn off the "cast shadows" in the light options:
Is that a known issue? Is there any way to fix it?
I tried to install the latest drivers for my gtx580 (in case the problem would come from there), but that didn't solve my issue either.
I'm out of idea, so I would greatly appreciate your help since I'd like to do my final render in marmoset. :poly122:
Replies
There are a few of things you can try to reduce shadow artifacts:
1. Move your shadow casting light so it is hitting the model at less of an acute angle
2. Adjust the width parameter in the light options, this will turn it into an area light, and a larger width setting will result in a larger physical size for the light and blurrier shadows
3. Enable front-face shadows in the render tab, this along with #2 may result in better quality shadows
4. Enable high resolution shadows in the render tab
5. Disable contact refinement in the light properties
I was able to reduce the artifacts a bit by following your advices. That being said it's still quite visible in the areas that have a lighter number of polygons.
I didn't have time to try it yet, but if I used a displacement map (and enabled the subdivision option in marmoset), I believe it would allow to get rid of the artifacts (of course it would slow things down, but for final rendering purposes that could be useful). Am I correct?