12. texture3d
Image texture for 3D point clouds
																J = texture3d(P,I)
																J = texture3d(P,I,u,v)
															
Inputs / outputs
- P = MxNx3; (X,Y,Z) point cloud.
 - I = Image for texture extraction.
 - u and v = [] or axes of the input image.
 - J = Output texture image.