Mesh optimized for creating geometry manually. Mesh optimized for creating geometry manually, similar to OpenGL1.x immediate mode. Clear all surfaces. Add a 3D vertex using the current attributes previously set. Add a 2D vertex using the current attributes previously set. Begin a new surface. End and commit current surface. Note that surface being created will not be visible until this function is called. Set the color attribute that will be pushed with the next vertex. Set the normal attribute that will be pushed with the next vertex. Set the tangent attribute that will be pushed with the next vertex. Set the UV attribute that will be pushed with the next vertex. Set the UV2 attribute that will be pushed with the next vertex.