Overlapping PointLight Shadows using MeshLambertMaterial

Question

I\'m building a small representation of my house in ThreeJS, and I have the walls and such sorted and am in the process of adding the lights. I\'m using PointLights as they are

Answer 1

You are having problems with shadows when you have multiple light sources and the material receiving the shadow is MeshLambertMaterial.

This is a limitation of MeshLambertMaterial due to the fact that it uses Gouraud shading -- the illumination calculation is computed in the vertex shader. Since shadows are computed in the fragment shader, there is no way to identify the light sources at that point.

For proper shadows, use MeshPhongMaterial or MeshStandardMaterial, for example.

three.js r.88