`uv2_vertex` and `uv2_pars_vertex` failing mtoon VRM rendering in Three v151

In Three.js v151 there were changes that removed uv2_vertex and uv2_pars_vertex which cause issues loading VRM files that have the mtoon shader.

I found that mtoon uses uv2_vertex and uv2_pars_vertex in Line 42 and 17 of the mtoon.vert file.

Line 42 in e4a2dcc

#include <uv2_vertex>

I attempted to comment them out, but as expected it broke things further. Reporting here as I try to solve the problem. :)

oh no. I will fix this in the next version.

Thank you for the report.

r151 support is way harder than I thought; there are many breaking changes on shaderchunks.
Expect more time to support r151.

See:

@antpb v1.0.10 should fix the shader compilation problem, please try the new version!