Texture Layering Bug

When using multiple texture layers, like the example above which has a shadow in shader.textureList[2], modifications to the scene can cause the model to flash.

The fix, shown at right, is to avoid texture layer #1. For example, use layers 2 and 3 instead, by starting off by moving texture layer 1 to layer 2.

Don't know why this works, but it does.

Light Map

The problem with director lighting is that it goes right through things. You can add a second texture layer that has bright and dark spots generated from a top-view render from 3dsmax. Usually we use this to add shadows so it's really more often a darkmap than a lightmap. (But everyone knows it as a "lightmap").

Note that the light/dark map image is grayscale (not black with alpha areas).