Next up the green dot to a side corner of the box. You can also fiddle with the position of the dots later if you're not happy with your perspective, so put them wherever for now just to get an idea of what you're looking at. The scene you end up drawing can be larger than box we're sketching out, so don't worry about size. Next move (ctrl-left mouse button) the light blue dot either above or below the horizon at the front or back corner of an imagined box/room. You can also rotate the crosshairs (alt-left mouse button) to have a slanted horizon line like the camera's tilted on its side. Where it is horizontally doesn't seem to matter much, but the vertical position is vital to place correctly now since moving it later will move the entire ruler instead of repositioning the horizon within it. The first thing you'll want to do is move (ctrl-left mouse button) the black crosshairs on your horizon line. I could not locate any tutorials on the subject so I figured I'd make one as soon as I figured it out. Lineart Timelapse Video (New one coming with my new tablet (Artisul D13) but here's the old for now): youtu.Paint Tool Sai 2 has perspective rulers and perspective grids, and I found the 3 point perspective ruler super confusing and unintuitive. Paint Tool SAI 2 Gradient Coloring: fav.me/dc0ko2u Paint Tool SAI 1 and 2 Brush Tool Settings Comparison Chart: fav.me/dbpay9g It'll look like a square, much like how the marquee tool looks PS: In case it wasn't obvious, you click a spot and drag your mouse cursor to whatever size you want the shape to be in, then release and it appears.

I know they're a huge pain in the butt, but with the new Shape Tool, it makes drawing circles super easy now! You can even make them ovals just by making the width longer than the length and vice versa

Here's a quick tutorial I made a while back on how to make perfect circles in SAI 2. *EDIT* THIS IS NO LONGER NECESSARY UNLESS YOU'RE USED TO IT! SAI 2's Ellipse Ruler let's you make perfect circles and you can resize the ruler to fit your needs (Holding shift and dragging one of the box outline corners up or down changes the size) I'll be keeping this up in case people prefer this method over the ruler method! I wasn't aware until recently that the rulers existed, so this new method is much better than the old one c: If you still want the old way, you can view it here: sta.sh/01tegly8cw9r *EDIT 2* Here is the updated tutorial on making perfect circles.

Ruler and grib paint tool sai v2