Multiple materials creates multiple geometries

[Pitel]

I've plane geometry with one LambertMaterial and one ShaderMaterial, which is just vertex shader (doing simple sinus waves). The result is lambert shaded plane with sinus waves above and it (screenshot). The expected result would be having lamber shaded sinus waves, or just not having multiple geometries, which is confusing.

• javascript (line 11 to 17)
• shader

[alteredq]

You can't achieve this with material array (this is just for multi-pass rendering of the same geometry using different materials).

You'll need create a new ShaderMaterial based on MeshLambertMaterial, adding your own uniforms and vertex displacement code to vertex shader:

https://github.com/mrdoob/three.js/blob/master/src/renderers/WebGLShaders.js#L1263