Shadows from ceiling in Top-Down shooter

[Akkel]

Hello,how immitate ceiling in Top-Down shooter.
ceiling must be invisible and cast shadows.
how i can do it?

[Graylord]

Use a plane that face downwards?

[Akkel]

i have already tried it.But these faces dont cast shadows.

[Graylord]

Make sure the mesh is set to cast shadows as if double sided.

[Akkel]

That helped,thanks!

[Akkel]

this working only for lightmapping.
Directional light dont cast shadows(

[Akkel]

Can i use Brushes for it?

[Spoondog]

Use a box or plane with polys on both sides. Hidden=true. Cast Hidden Shadow = true
[screenshot]http://forums.epicgames.com/attachment.php?attachmentid=8775&d=1341579307[/screenshot]