Help reducing scale dependent lightmass artifacts?

ZacD · Oct 2013

For the scene I'm working on, it's going to require some very clean lighting, I brought in my low poly modular mesh as soon as it was unwrapped to make sure I could get the lighting right.

The hexagon on the left is 4x bigger than the one on the right, as you can see this effects the artifacts I am getting, I've tried disabling compression, increasing the number of light map bounces, and increasing the light map resolution, but none of those have worked. Does any else have anymore ideas? It almost looks like it needs more sampling in shadowed areas. The shadow lines are clean and sharp, and color is being properly reflected and bounced, so it doesn't seem to be an issue with the UVs for the light map.

r4ptur3 · Oct 2013

Try cutting your light bounces all together -- it might help. Have you considered dynamic lighting instead? I know it is kind of taboo in UDK, but it has produced some nice results in tests.

ZacD · Oct 2013

I was hoping to get some soft lighting, but I'm not sure how possible that would be with dynamic lighting. Also the lighting is going to be similar to this image, which I have no idea how I'd fake dynamically.

Santewi · Oct 2013

Have you tried World properties -> Static Lighting Level Scale?

mAlkAv!An · Oct 2013

I'd suggest to set up the lighting similar to your final level for further testing. Especially if you gonna use emissive lighting the result might be very different to the default scene which has a dominant directional light with distance field shadows.
You might also get some unwanted shadowing due to lightmass ambient occlusion.

Help reducing scale dependent lightmass artifacts?

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