+1000
If you didn’t know, there is a track freeze tool; Freeze Track | Renoise :
“The tool will render down a single instrument track into audio files either on a pattern by pattern basis or as a single linear sample.”
But something like this natively for use with selections in the pattern editor would be great to have as well. There is the “render and slice” tool though; https://forum.renoise.com/t/new-tool-3-0-render-and-slice/
Ideally it would be great if the rendered sliced data could replace the original pattern editor selection, muting residing Track_dsp/vst fx for the time of the rendered selection, so the result is seamless on the same track. But having the renders placed back into the song is already a big win imo. Seems like the tool is gone though