Nanite + Virtual Shadow Map Issues

Development Rendering
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1

Hello

I am trying to achieve nice looking shadows using Nanite and Virtual Shadow Maps. However I am having some issues with shadows being blotchy and badly rendered I understand this is because Nanite is optimizing my meshes rather aggressively. But I was wondering if there is any way to have it not affect the virtual shadow maps?

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When further away the shadows look good. But when close they become very blotchy.

Of course one other solution would be to use regular Shadow Maps but I am getting very blurry and bad-looking shadows with this approach as well so would prefer it if the virtual shadow maps were usable with some setting.

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Best Regards!

2

Hi what UE version are you on because VSM (Virtual Shadow Maps) were only production ready in 5.3 so i would recommend to upgrade to 5.3 or 5.4 i remember having this same bug if you cant or dont want to upgrade is not a ideal solution but just disable nanite and use LOD’s on the affected mesh.

3

Hey sorry for the late reply. I’m using Unreal engine 5.4.

I do believe it is because I’m trying to use Nanite on an AnimToTexture Static mesh which uses alot of worldPositionOffset in the material which is probably what’s causing the issues.