> I get the same result here. It seems the same behavior also occurs in cvaniau > [Castlevania - Bloodlines (USA)]
Bloodlines has problems with GLSL in general, which I don't entirely understand. The only functional OpenGL debugger out there currently requires Ubuntu on hardware (not virtualized) with an accelerated card, which puts a crimp in my ability to see what's going on.
 Valve's VOGL. AMD offers a Windows OGL debugger which does nothing worthwhile when you run it against MAME, possibly because I have an NVidia card.