Hi again,
I hope you don’t get an impression I am spamming the group, but I took my previous output a few steps further (thanks @janrykr) - after all, how can I measure that I actually achieved the desired goal - turning labels into something meaningful. So, I vectorized the isolines, overlaid labels over lines, forced lines to 3D with the elevations received from points, built a TIN, added the source raster as a texture, and used my 3DModelVideoRenderer to visualize the output, giving this post the necessary for this group AI-component - the Python code in the transformer is generated with AI. Considering that not all lines got elevations, I think the result is actually quite good.
Dmitri