Extend column to non-planar floor

Hello all,

I've tried finding an answer to this problem, but couldn't find it. If anyone knows where this has been discussed before, I'd welcome a link!

I'm looking for a feature to extend concrete columns to a form/shape in a similar way as it exists for walls.

The specific situation now is that the floor is not horizontal. It slopes down to prevent fluids from accumulating. So simply extending the column base results in something like this:

For quantities it is not really a problem, with the average length the volume and side surfaces will be correct.

But on drawings it looks messy. What can I do to fix this?

I also tried using the "Prostructure Modify" but that one doesn't seem to work with OBD floors (also not with a standard non-sloped floor).

Thanks in advance for the assistance!