Unreal BSP Question?

ajv3d

Hello Community!

I'm trying to add BSP to a BSP ground plane. The BSP sharing the same space, but for some reason I'm losing the ground within the room. Is there a way to stop this from happening so both pieces of BSP can share the same space without losing the ground floor within the building?

cholden

This is how BSP works. You put a block on a block, and this is the inside of solid space. To get a building, use a brush for the floor, each wall and ceiling. OR if you want that current room to be hallow, add a subtraction brush inside of it

ajv3d

I was planning to subtract BSP from within the BSP I added for the room itself... I haven't heard of anyone using a brush for each wall. Is this a standard practice?

cholden wrote: »

This is how BSP works. You put a block on a block, and this is the inside of solid space. To get a building, use a brush for the floor, each wall and ceiling. OR if you want that current room to be hallow, add a subtraction brush inside of it

ajv3d

I do want the current room to be hollow, but when I subtract inside of it, I lose the floor. It's the reason I posted this thread. It all works if I build the room above the ground floor, but I want the room to share the same floor as the ground plane, and subtracting space from within the room causes the floor to go too.

cholden wrote: »

This is how BSP works. You put a block on a block, and this is the inside of solid space. To get a building, use a brush for the floor, each wall and ceiling. OR if you want that current room to be hallow, add a subtraction brush inside of it

sprunghunt

add a subtract brush

then select the floor brush and right click it. Go down to the bit that says order. Click on the bit that says "to last".

ajv3d

Yup, I ended up finding something on youtube explaining this a bit more. It worked like a charm. Thanks.

sprunghunt wrote: »

add a subtract brush

then select the floor brush and right click it. Go down to the bit that says order. Click on the bit that says "to last".

WarrenM

It happens that World of Level Design has just started up a series of tutorials on using BSP in UDK if you're interested. He's up to part 2 of 3 now...

http://worldofleveldesign.com/categories/udk/udk-simple-room-creation-part1-bsp-block-in.php

http://worldofleveldesign.com/categories/udk/udk-simple-room-creation-part2-bsp-brushes-workflow.php

Apophis3d

I would recommend not using subtraction brushes and just build all with additive. It allows for you to quickly change something if its not working out because you don't have to worry about moving two brushes.

Also ive seen Max and Maya do strange things with subtraction brushes when importing in level blockouts.