/ic/ - Artwork/Critique

>>7021389
Personally, I would free hand during the composition/sketch phase because I want to get a feel for the scene quickly. The buildings become a way to frame the central subject as opposed to a mechanical perspective tool. When you are sketching, you can use already drawn perspective-parallel lines as your rough estimator of a vanishing point. Then when you want more accuracy, you create a ruler object and roughly fit it to your scene, then fix up any lines that noticeably diverge from the ruler (if you care to, it really depends on what kind of picture you want to draw, and sometimes roughly accurate is good enough; Or you can use slight curvature to give a slight fisheye feel to it, in which case your painting program is less likely to provide a built-in ruler for this; however, you could find a plug-in or 3rd party tool like Lazy Nezumi, or just eyeball it).

Here is an example sketch, and then I roughly fit a 3 point ruler to it (using Paint Tool SAI v2). The ruler object makes the divergence in my roughly oriented lines much more apparent.