[Solved] My level in ut3 runs much slower in udk

[SneakySoft]

hey everyone,

I just downloaded it (thank epic!) and created a map with all the new stuff in it like fluid surface etc...
when I run the map it is very slow. When I created just a substractive box with a light in in, it was also slow. I think it has something to do with ambient occlusion being turned on. Even when I place no light at all in the map and put just an emisive color on the wall, it is slow. And it has very cool looking shadows in the corner, what ut3 didn't had, so I think that is ssao.

Anyway, It is turned off in the world properties, and it still runs it. I can't even play my maps normal. Even with global illumination is turned off it runs crap. I know I have an old pc, but ut3 runs on it, so there should be a way to make this run above 60 fps as well in an empty room.

Anyone knows how to solve this?

[EDIT]
Go to:
C:\UDK\UDK-2009-11\UTGame\Config\UTEngine.ini
Edit-> Find (ctrl+f) AmbientOcclusion
Set it to "False"
On my pc it runs 3x faster now.

[Zomy]

Do you have the lattest drivers?
Specs of your PC?

[Phill]

Try building the map as additive and see if the problem persists? I've had problems with subtractive in the past.

[Cr4zy]

Do not use subtractive mode for a start. Im not sure why it still exists because it's a hack in ue3. It places a huge additive BSP cube the size of the world whixh you subtract from, so when you build it you have a huge cube being calculated.
Start in additive mode, place a additive bsp block in your world and subtract from that, keeping it as small as possible will help performance.

[SneakySoft]

I will try additive when I come home, but I don't think it would make a difference.
@Cr4zyB4st4rd - I know about the huge additive block but that doesn't mean it should mess up the lighting. I just use it to quickly test some stuff I made.

It is a laptop and I think the specs are:
Intel Core 2 Duo P8600 - 2,4 ghz
NVIDIA 9300M GS 256 Mb, DirectX 10
4GB RAM
I will check the specs when I come home, not a 100% sure :P

Don't forget that it can handle my ut3 maps. And even if the problem was my specs or the subtractive state of my level, it still shows a darker edge in the corners like ambient occlusion does, so I just want to know how to turn all the lighting off.

[Xendance]

Disable ambient occlusion. You can do that in some .ini file. I don't remember which it was and I don't have UDK on my netbook.

Edit: I should read the posts before posting myself.... Well, if you tried disabling it and it didn't help, I'm out of ideas.