rt_createplanematerial(Name,R,G,B). in: Name,R,G,B. Create a plane material of color (R,G,B). Name is the name of the material. rt_createsphere(Name,X,Y,Z,R,Mat). in: Name,X,Y,Z,R,Mat. Create a new sphere with material name Mat, with center in (X,Y,Z), radius R and with name Name.