Bold Font in LO 4.1

I use the font “Futua LT Light” without a bold font. LO used to calculate a bold font out of the regular font, and this looked nice! As of version 4.1.x, the result became useless because the letters are too thick.
Any idea how to change this?

How much thicker? Have a look at the attachment in the bug I link in my answer below. If that is similar, then it should be sufficient, but if you are seeing something different, then please provide a visual indication.

This issue sounds similar to bug fdo#71249. Does that look similar to what you are seeing?

Different font, but similar effect, yes.