Light/Shadow problem

[HavocInferno]

hey guys,
so heres my problem...i made some crappy stuff, added some lights, directional lights, lightmass importance volumes, but when i build all, i get some weird shadows...how can i get those shadows better?

thx for advice

P.S.: the materials are all selfmade...

shadows:
[SHOT]http://lh3.ggpht.com/_-3_qXEBCno8/S6Z9yiKawMI/AAAAAAAAAI8/r0quFttC2R4/s1280/ScreenShot00006.jpg[/SHOT]
[SHOT]http://lh4.ggpht.com/_-3_qXEBCno8/S6Z9y9i2GuI/AAAAAAAAAJA/pxFVF98UuOI/s1280/ScreenShot00007.jpg[/SHOT]

materials:
[SHOT]http://lh4.ggpht.com/_-3_qXEBCno8/S6Z-ekE_cbI/AAAAAAAAAJI/g6AzWUprtl4/s1152/UDK%202010-03-21%2021-12-43-65.jpg[/SHOT]
[SHOT]http://lh5.ggpht.com/_-3_qXEBCno8/S6Z-fEzqfoI/AAAAAAAAAJM/tMuNJyDA8wE/s1152/UDK%202010-03-21%2021-12-53-39.jpg[/SHOT]

[Zomy]

Check Lightmap resolutions.
If you are using BSP brushes, set the lightmaps to 2 or 4.

[HavocInferno]

Check Lightmap resolutions.
If you are using BSP brushes, set the lightmaps to 2 or 4.

where can i set those?

[Xendance]

I can't see anything in those pics.

[HavocInferno]

does anyone know how to set the lightmaps to 2 or 4 because i used BSP brushes for this and Zomy said i should set lightmaps to 2 or 4...but where?

[Zomy]

Sorry, i forgot i post here u.u..
Select one or multiple surfaces and press F5.

[ThePriest909]

Ah... the classic lightmass issues.
Lighting passes throught the bottom of a wall.
Lightmass resolution for brushes won't be much of a help, considering that this sh...t also happens with static meshes (in my case, even if those statics are half-placed below terrain's surface)
I'd just love to read an official answer on this matter.

[HavocInferno]

is there a way to select all my surfaces at once? or do i have to click on everyone of them?

2. question:
you said i have to set lightmaps to 2 or 4...in the surfaces' properties, there is always a value of 32 (lightmap resolution)...now do i have to set the value to 2/4 or to 64/128 (<--32*2/4)?

[HavocInferno]

please! i need this information quickly..