My level contain mdl models and hmp terrain. All work fine. When i create simple box with invisible flag(for creating unpassble areas). I see error Message CRITICAL ERROR E003 - no
visible blocks in map. I create another simple box without any flags. I don`t see error message, but my first block is invisible, and passble. How create unpassable areas on level? If i use invisible mdl models is this slower then use simple blocks?
