Mapping resources

Radiant tutorials:
Brush cylinders Creating cylindrical brushes with grid-aligned vertices.
Basic rock walls Creating simple rock walls using the tesselated triangular brush method.
Basic two and three point clipping Application of two and three point clipping to build an archway.
Internal rockwall corners Extention of tutorial 2 to create a small cavern.
External rockwall corners Extention of tutorials 2 and 3 to create an external rockwall corner.
Thick-walled patch pipes Pipes that have internal and external surfaces.