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