Does anyone know of a decent implementation of triplanar mapping with parallax height maps thrown into the mix?
I see a few assets in the store that claim to do this but is there any code out there that shows how this is implemented and is it performant?
If possible, it will be fairly heavy. Triplanar uv’s can be generated fairly easily, but in this case you also need to generate three sets of tangent space vectors and perform the parallax mapping three times. Parallax mapping in itself is fairly heavy, so doing it three times might not be the best idea.
And if you want some good looking transitions you can’t just blend the final color. You’ll have to blend the actual heights. This means that the three parallax mapping processes should be coupled during execution, making it very tricky.
Here you can find a very fast implementation including parallax-specular.