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Any graphics/3d-art people who follow me ever done anything like tri-planar mapping where one axis is different? I'm imagining a way to map a wood log, where when cut across, shows the rings. Perhaps generative texturing or volumetric textures would be better?
I was thinking of something like Asymmetric Triplanar Mapping to achieve the look. (ref https://medium.com/@bgolus/normal-mapping-for-a-triplanar-shader-10bf39dca05a … from @bgolus )pic.twitter.com/vsNtep0AdQ
For something where the bark is still on the log, I think this look could really work. For something where it's already been hewn, and the sides need to line up with the pattern on the ends, it won't work as well. But maybe it's good enough?pic.twitter.com/9SVr42fqLT
Hewn logs clearly match up where there are cracks on the sides, and even the rings on the ends match up with the lines on the side. Hmm...pic.twitter.com/tu3CcbF8wx
I don't actually think a triplanar projection is exactly the correct approach for this. The log's exterior itself should probably be textured normally. The interior can be custom planar projections, or maybe a 3D volume texture. https://simonschreibt.de/gat/metal-gear-rising-slicing/ …https://twitter.com/mattstark256/status/1218583432789463041?s=20 …
A log especially you have the expectation of the rings being at least mostly centered. The volume texture approach is difficult to generate, takes quite a bit of memory and/or is blurry, and is extremely bespoke to each individual log mesh, but it's relatively cheap to render.
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