Foilage brush paints on blocking volumes

Even if I hide blocking volumes, the foliage brush insists on painting on them.

Is this expected behaviour?

Yes this is expected behavior they are considered meshes or BSP one of the two. I like to hide/move/delete blocking volumes temporarily when doing foilgae painting. You can also try pressing G for game mode to hide them or hiding them in the view options.

Hope this helps
Don’t forget to accept an answer that best clears your question up or answers it so when the community finds your question in the future via search/google they know exactly what you did to fix it/get it going.

Thank you, that makes sense.