A mapper's worst nightmare is: BSP (Binary Space Positioning) cuts or "holes" that interfere with a map due to inexact collision of some brushes and too many polys. There ARE some ways to take out those bsp cuts. Say I used a brush from my ut2004 brush pack and it's solidity was 'solid', this would probably generate some problems due to the high polys on the brush. So, how about changing it to semisolid? You can change it's solidity by right-clicking the blue wireframe of the brush in wireframe view mode, go down until you find solidity -> Solid Semisolid Nonsolid. Once you click semisolid, it should change the blue brush into an off-white peach colored brush. Now your brush is semisolid, and will result in less chances of bsp cuts. But, if you choose to keep it semisolid, do NOT let it touch any solid brushes, It's bound to cause more bsp problems if so. If you absolutely have to let it touch a solid brush, keep it solid. Now, another way to drastically reduce bsp cuts is changing the brush to a nonsolid, and adding a block all actor around it
(Located in Keypoints).Nonsolid brushes are represented as green. If you cannot see the radius of collision on the block all actor, go up to your viewport window and right click where it say's click here in the pic.
Then go down to Actors -> Radii view, it will change it so you can see the radius of actors that you click on. So, click your block-all and notice how small the block all radius is, we need to make it big enough so it covers the entire brush! NOTE: You won't get exact brush collision when you use this method because it will be hitting the circular collision of the block all actor. So, go into the block all's properties -> Collision -> Collisoin Height and Collision Radius. Set those to how you desire, notice when you set it to a different number, the "red cylinder" around the block all changes size, change it so that it completely cover's your nonsolid brush. then save it and play it! (Oh, you might not want to use this method TOO much, it can really mess up the BSP tree, but it is handy for fixing those bsp cut's 1 or 2 brushes are causing!
Shadow342
