Bumpmaps only filtered in one direction (or both)
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If i use the Displacement Input for a material then it is easy to see that it is not filtered or maybe only in one direction giving viewable pixel rendering artifacts. I appended a screenshot to illustrate the issue.

Sergey Sharybin (sergey) added a comment.Via Old WorldJun 20 2012, 3:41 PM

Brecht, could you please look into this? Thanks :)

Tobias, likely having sample .blend file would help figuring out the issue here.

Tobias Oelgarte (niabot) added a comment.Via Old WorldJun 20 2012, 3:51 PM

I appended a simple file that illustrates the issue together with the bump map (exr file in same directory) to illustrate the issue. I also did some other stuff in this file to circumvent the issue, but that is deactivated at the moment. It's just a simple material with an bump map texture with UV mapping.

I appended a stripped down second blend file (uses same texture) to simplify things to the very basics. You might want to change the perspective and to zoom in as needed to get a better view.

Brecht Van Lommel (brecht) added a comment.Via Old WorldSep 28 2012, 2:41 PM

It's due to our poor texture filtering algorithm, we don't do anything like EWA texture filtering yet, and it can indeed look quite bad with bump mapping. It's on the todo list to improve this, but for now not considered a bug.

Brecht Van Lommel (brecht) closed this task as "Archived".Via Old WorldSep 28 2012, 2:41 PM

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