The texture looks like triangles DISTINCTLY

[AsciiP]

After I connect the Solidify Colors nodes, I run the Block-On, but some textures look like big triangles distinctly.
Is this a sampling problem?

This occurs on large mesh with small image texture.

[BrendanParmer]

Right now the node network is only sampling one color per triangle face in the original mesh for this mode. At some point in the future I plan on having it sample the nearest fragment so you don't get these triangles; I just haven't had time to update this project in awhile.

For now you might be able to work around this by subdividing the original mesh, which will create more triangles for the add-on to sample from.