CopySurface(src, dest, left, right, top bottom)

Blitz3D Forums/Blitz3D Programming/CopySurface(src, dest, left, right, top bottom)

Can somebody tell me what this undocumented command is for?

CopySurface(src, dest, left, right, top bottom)

(or alike parameters). Seems it's not a mesh surface is it?