How do i make something subtractive?

I am having a hard time in Unreal 4.7 and the tutorials are slightly outdated. They simple select an object and make it a brush and then make it capable of being subtractive. How do we do that now? Please help I’m stumped…

When you have a bsp brush selected you can select the brush type under the details panel / brush settings. It defaults to additive. There may be a shortcut for it as well.

There is a big difference in how static meshes and bsp geometry works.

Static meshes are made in external 3d applications, imported as assets in the content browser and then pulled into a scene viewport to be placed.

To use place bsp geometry, go to the modes panel (top left in default layout).
Make sure you are in place mode. Then go down the list and pick BSP, after that you can select and drag a brush into your level. Once there you can modify its properties further.

You may notice the fifth mode called “Geometry Editing” in the modes panel. When this mode is active you can edit the shapes of bsp brushes to your liking. They do have their limits though at which point static meshes are the preferred method for adding geometry to levels.

Here is a link to BSP documentation:

Unfortunately all of the objects i place become StaticMesh. Where do i select bps brush?

Thank you! Much clearer now!