Timothy Lochner

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.

The custom projection method is a bit more manual work to setup, but you could potentially reuse the same "inside" texture for a lot of different meshes meaning it's a lot more memory friendly. For Revengeance they're doing mesh splits & UVing on the CPU.

It's at least plausible to have something like a set of points w/ radii you define per-mesh that would control the center line and main axis of the projection direction, and then in the shader find the nearest line segment and reconstruct the appropriate projection.

I was thinking that you could tri-planar map in object-space, so that you can assume the z axis is always the "inside" axis, and oriented around 0. You just have to model the log correctly. I really like the volume texture idea.

If the log in question is straight, sure. You weren't specific in your original post.

Even as I was replying, I realized that it'd be nice to be able to bend the log somewhat. Hm.

See the Revengeance stuff, both that @simonschreibt link above, and the (now deleted) article it references (which can still be found on http://archive.org ) https://web.archive.org/web/20130220061154/http://platinumgames.com/2013/02/13/a-cut-of-the-characters/ …