The forth parameter of VertexColor is VertexAlpha.
Some machines have Problems when mixing Mask mode and Alpha mode. Read the versions.txt, there's a note about the reimplmentation of the ability to mix them. Some cards may however make troubles, probably that's the problem.
Some machines have Problems when mixing Mask mode and Alpha mode. Read the versions.txt, there's a note about the reimplmentation of the ability to mix them. Some cards may however make troubles, probably that's the problem.