Material/shader looks great in editor, but solid green/red in build

Unity Engine
1

I am a complete Unity newbie, in the beginning stages of making my first app.

I exported a mesh+texture from a different piece of software (Houdini) and am trying to get it to show up in Unity. I copied my shader from an online tutorial at Unity Shader to visualize vertex color. · GitHub

It looks as expected in the editor, but when I run it, I get a weird green/red material. Any ideas what might be happening?

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2

Looks like the shader is for visualizing vertex colors, so you probably are using vertex colors? If it looks ok in editor window, I wonder if you are doing something to that vertex data when you go to run mode.