Oh, I see, hover over guide + del deletes a guide. Wonderful!

Complete solution: I draw guides to horizon vanishing point, use guide intersections to snap and get perfect perspective lines! This is very cool indeed.

Thank you!

Thanks!

Guides are working solution, to a point. I just draw enough them (towards vanishing point etc.) and use guide intersections!

However, I end up with loads of guides. Are there ways to delete guides?

However, this is quite neat trick, thanks a lot!

I have used 3D Box tool and it works wonderfully! But now I need to draw plain lines (not boxes) in perspective. I have not found a way. I know that I can draw a line to vanishing point with Pen tool and then cut it by creating new node etc., but that is clumsy. Also, of course I can make 3D Box and...