you can do that on all bricks i thought, for the corner L shaped bricks you can, for the tree you can, for ramps i think you can, for arches you can, for rounds there's nowhere to build in them, so you can, what are you asking for?
that you can build in the spaces in the sections of it like a ramp you can put another ramp faceing down for lego ness or something
Every brick has to take up a squarish or rectangular space on the static grid.
Every brick has to take up a squarish or rectangular space on the static grid. L bricks take up an L shape, so you can build in their spaces. However, ramp bricks take up a full square. No other brick can exist in that spot while that ramp is there, even if real-life physics should apply there. It's easier to see if you turn rendering off on a ramp brick. To fix this, it would require an engine change, which would be stupid for other reasons.