Thanks for the answer but unfortunately I made a mistake on the original
post and I apologize for the confusion.
p_map2 should have been declared as
#declare p_map2=pigment {image_map{jpeg "tex.jpg" interpolate 2 transmit all
0 filter all 0 } }
Filter all should have been 0 intead of 1 to avoid filtering.
If I try each material on the same scene Mat1 is always brighter than Mat2.
FlyerX
