Ok i've misundestood. Have a lot of USE_AABB in scripts that I try to convert to Lite-C, but get some strange results when I tried to replace AABB with OBB while using block geometry and mdl's. Thanks for the clarification.

Just one more question. I have A7 Commercial and can only make use of ABT. How does someone with Pro tell the engine to render not as ABT, but as BSP? Is there something like a checkbox, button or program code that must be in place before it will be rendered in either BSP or ABT?