alpha map

[Anonymous]

Hi!
I use tif texture with alpha map.
Alpha map is white background with black dots.
I need it to get perforations on my surface.
with internal engine everything works well.
I have those perforations and the rest is corten solid surfaace.
Problem starts to emerge when openGL engine is turned on. I still have those perforations, but the rest of the surface becomes transparent.
I would never bother with that, but when exported to BimX a get this wierd situation.
What should I do to fix that?

on attached picture this perforated surface is on the left. right side is the same material but without that alpha.

Once again, my alpha channel is white (255,255,255) and with black dots (0,0,0).

[Anonymous]

Hi There

I have done something similar but I couldnt get an alpha channel to work in AC21 with cinerender engine with black and white so I have a white screen with transparent holes and saved as a png for internal engine, but im not sure how to apply a texture like you have applied the corten steel