Mask transporency does't work with background scene.

Seems like bug for me. Here is the scene:
http://dl.dropbox.com/u/8845134/forums/alphafuuu.blend

If you run game in BG scene, transparency will work fine. But if you do in “Scene” scene, that adds BG as background, mask transparency will not work.

i dont know much on how mask transparency works, but the transparency didnt quite work on the BG scene imo. it looked like the transparency turn into the horizon colour, giving a feeling that its transparent, but i dont think it is.:no: But if you are looking for a quick fix then see the attachment, that works ok with Z-transparency.

Attachments

alpha_test.blend (513 KB)

turn into the horizon color - that’s what I need. Z-transparency is slower, so that’s why I want to use mask transparency,

Yeah z transparency can be heavy sometimes. Although some optimizations can be done.
In that case you should report a bug in the bug tracker.