Pushes a buffer of Materials. Those Materials are in the format float[n*12], with
mbuf[n*12 + 0-3] - ambience
mbuf[n*12 + 4-7] - specular
mbuf[n *12 + 8-11] - diffusion values
/* each line has r,g,b,a value */ float bla[24]= {1,0,0,1, 1,0,0,1, 1,0,0,1, 0,1,1,1, 0,1,1,1, 0,1,1,1}; s3d_push_materials_a(object,mbuf,2); /* push a red and a cyan material */