EEVEE - Distance Bump/Normal's Spec dancing - animated camera #59982
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Reference: blender/blender#59982
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System Information
Operating system: Both Linux and Windows
Graphics card: AMD R9 390
Blender Version
blender-2.80.0-git.7c438e5366b2 (and 2.8 before)
Short description of error
both render and viewport have dancing specularity on bump/normal maps and the edges are so jagged
Exact steps for others to reproduce the error
add a bump or normal map to a plane and move camera (or viewport), uploaded a sample scene
bug_report_bumb_distance.blend
Added subscriber: @shylon
it is specially visible when moving vertically
Added subscriber: @moisessalvador
I hope they fix this. The Bump node basically causes bumps at half the resolution of the render. My understanding is that it uses the difference of value between adjacent pixels and that's why it's half res. It was also like that in 2.7's material viewport, but I think Eevee needs it if it's going to be used in final production. Maybe internally sampling the bump texture at double the render resolution, or with a jittered approach for each sample. I had to render at 4k so it's less noticeable ?, luckily Eevee is fast. Btw, actual normal textures with a Normal map node, like tangent space normals, look fine and fullres.
Added subscriber: @ixd
Yep, that's known limitation. Explanation:
Source: https://docs.blender.org/manual/en/dev/render/eevee/limitations.html#materials
Possible duplicate of #58522
thank, yes seems normal map is way much better.
Changed status from 'Open' to: 'Resolved'