gwaldron/osgearth — pull request #239 by aurelien35 (2012-10-02 12:51:31+00:00)
Title: Use of shaders with TextureCompositorMulti even if there is no image layer.

I've also removed the MAX_IMAGE_LAYERS definition to use the current map value getted from MapFrame object.

So now the only limit to texture count use is GPU capability and shaders can be used to do terrain coloring even if there is no image layer.