Sure amazing things can be done with it, but amazing things can be done in paint too. The symmetry tool is amazing, even if a primite variant of it exists in photoshop… And when I say primitive I mean it feels like something from the stone age. The concentric circles tool does the same but for circles. Using the paralell lines ruler allows me to draw perfectly parallel lines quickly and efficiently.

These are extensively used and have a wide range of applications. PaintTool SAI: Product Overview: PaintTool SAI is high quality and lightweight painting software, fully digitizer support, amazing anti-aliased paintings, provide easy and stable operation, this software make digital art more enjoyable and comfortable. Comic studio is optimized to work with black and white images in high resolutions and it is DESIGNED to work with the cursor-snap rulers. Photoshop is a general-use tool for photo manipulation that can be made to do other stuff. I can do neither in Photoshop because I have to work around the limitations of not having any way to stick the tools to lines.

I can do free-form perspective on paper, I can do serious-work perspective on paper and I can do both in Comic Studio thanks to the perspective tool. It is absolutely essential for quick perspective work. Lineart Timelapse Video (New one coming with my new tablet (Artisul D13) but here's the old for now): youtu.The perspective tool owns the crap out of photoshop. 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.

Paint tool sai 1 ruler