Hi!!! ı really need to make a surface between these 3 lines (two blue and one yellow marked). I tried everything I know but nothing helped.
Could someone help me?
Looks like sweep2 might be an answer. You might need a third line on the opposite end of the blues —-Mark
The 2 blues are your rail crvs and yellow is the cross section crv
Or Sweep1 with the yellow as the rail and blue as the cross section curves. Experiment