Incorrect Triplanar blend weight, with fix.

[JonnyS7G]

In the TriplanarProjection material function, the final Normalize operation under the "Weigths computation" comment section is not correct according to the reference paper at http://transvoxel.org/Lengyel-VoxelTerrain.pdf, causing visual artifacts over the blending area (brighter seams). To fix, you just divide by the sum of the components, instead of using Normalize.

[Phyronnaz]

Thanks! I've fixed that on my local version, however it may take some time to update the repo.

Have a nice day!