This setting causes asserts when modifying certain material flags after they are assigned to a node, in case a shader has been generated that uses the materials, which cannot efficiently detect whether the material has changed. However, we already sort of have a (inefficient, but effective) solution for this in TextureStage (see #178) that we could just apply here as well: changing the material attributes after such a shader has been generated could call GraphicsStateGuardianBase::mark_rehash_generated_shaders().
In the future, we should replace the material model with one that does not require shader regeneration for such seemingly trivial property changes.
Fixes#370
rdb
Sam Edwards
tobspr
David Rose
Josh Yelon