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Hans Jakob Muller

Mesh smoothing still not fixed?

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I posted this 11/16/06 both in the techboard and as a bug submit.

"I tried to render a quite complex mesh, converted from a terrain model to be able to apply an image texture to it. Everything worked fine until I turned mesh smoothing on in the document settings. Then the mesh turned black. So I did some experimenting and found out that a smoothed mesh with an image texture will not receive light other than ambient light. If I use a procedural texture it will render fine and smooth. There also seems to be a connection between the size of the mesh and the result you get. You never get a smooth mesh with image texture, it?s alway edgy and full of artifacts, when the size of the mesh (number of triangles) increases, larger parts gets black. This looks like a bug to me, but is there a way around it in the current version? I really see a potential for higher realism in rendering architectural models with this feature!"

The reply on the bug submit was that this would be fixed in the next upgrade, but it seems to me this hasn?t happened. I?is a pity since mesh smoothing is most interesting with photoreal rendering. I?ve tried many programs, also cheap ones, where mesh smoothing combined with image textures and raytracing isn?t a problem. I don?t think this should be so hard to fix and should be a standard feature in any 3D program. A drape surface isn?t an option since it reduces accuracy. The best thing in this particular case would be to smooth and texture the terrain model directly, but I imagine this would be harder to achieve.

Hans Jakob

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