We are testing vector displacement with Mantra (Houdini render).
We are writing the vector displacement shaders ourselves and we are now checking the Zbrush Diagnostic
to see if the shader works correctly, and with which Zbrush setting.
Main question: how perfect does one of the spheres of the diagnostic need to be?
Can the ‘right’ sphere still exhibit little imperfections, or when things work the sphere is a perfect flawless sphere?
Our world space shared works fine and makes a perfect sphere with the option ‘7’.
In tangent space, the sphere ‘1’ looks good but has some little imperfections, see the attached jpg.
We wonder if these imperfections are acceptable as other tests with our own models look ok, of these imperfections are caused by errors in the shader.
Another question.
The ‘4R4 what’s new’ PDF mentions that 4R4 introduces a new Diagnostic, based on a cube with shapes cut into it instead of the little sheres. We use 4R4 on MAC
and the diagnostic created by 4R4 is just like the previous one.
Is the new diagnostic not yet available and there is an error in the doc, is it available on the Windows version, or is it somewhere here on Zbrushcentral to download?
Thanks everyone.
AndreaF
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