Surface mask problem

[nikoue]

Hey everyone.
I created an existing Ground surface.
For visualization purposes i use several surface masks, 12 exactly, to apply different materials to it.
10 of these masks works as expected. But 2 of them, if applied the surface, dissapear the surface in that area.
Any suggestion

[tcorey]

Do all twelve Masks have Render Only set to Yes? Look in Mask Properties. You will need to go down your list of masks one at a time and check this setting.

[nikoue · Accepted solution]

Yes all masks have Render only mode to yes.
I solve the problem.
I recreate the polylines and the problem solved.
I don't know what problems they had.
A lot of times recreating polylines from scratch solves a lot of problems .
Thank you anyway.