thanks but not fix the problem....

anyway I find the problem, but not the solution
ok if you create a new level when a light and the sader

and run


ok rare because the sun this and ambient is to cero


ok now you change the sun elevation to 0


and run again


now the floor this correctly illuminated one

well well the sun inclusive when 0,0,0 it affects to the textures that use saders for that if I rotate the sun azi mut to 90 grades


and run


now the texture that fails is the one that receives the sun, but him but incredible it is that sun this at 0,0,0


ok bya bya