stdmaterials
------------

bytes  word   description

 0-11   !0    material's name (11 chars)
12-15   !12   gloss(0..63) +riflR(0..255)<<8 + riflG(0..255)<<16 + riflB(0..255)<<24
16-19   !16   rifra(0..255)+trasR(0..255)<<8 + trasG(0..255)<<16 + trasB(0..255)<<24
20-23   !20   preferred colour (&BBGGRR00 or 255 if the material doesn't have any)
24-27   !24   diffusion(0..1023)+ambient(0..1023)<<10
28-31   !28   reserved - set to 0