Did you try Edge Tools?
https://sketchucation.com/pluginstore?pln=tt_edgetools
It has a Straighten Co-Linear tool...

Beta testers of Rayscaper
Did you try Edge Tools?
https://sketchucation.com/pluginstore?pln=tt_edgetools
It has a Straighten Co-Linear tool...

@Glenn-at-home said:
Where is the link?
It's a mystery....
If you take a spill off the stairs at least the table will break your fall!
Shame you can't use the embedded materials in RS. Makes iterating various design choice very fast.
Are you using the latest version of both Curviloft and Libfredo?
That may be the reason you are prompted. Otherwise you may have simply forgotten you installed at some point.
Congrats on your — launch.
why can't I upload the skp?
Ok,so this upload issue is due to a recent update to our forum software. Seems to have affected everyone using this software so expect a fix next week.
Until then non-standard file types like skp, obj, fbx etc are not supported until they publish a fix.
Not entirely sure what texture for the picture wall
Why not use the Polyhaven assets that you can drag drop in RS?