How do I cut a shape out from a sprite

I have a circle sprite and I want to make a ring. How do I cut out a circle from it?

 

Does this require masking?

 

Yes, the short, Getting-Started-level answer is, "you don't." Just make another, ring-shaped sprite.

 

ok... use two cameras... one camera has a "gimbol" or a "traveling matte" on it.. that's just a circle cut out (should work with an ortho camera view), call that HoleCamera.. give it a deapth of 99, since you want it drawn on top... have it, do nothing with the background.. "don't clear" I think..

ok, second camera, just duplicate the first, without the Traveling Matte (https://encyclopedia2.thefreedictionary.com/Traveling-Matte+Method) call this camera RegularCamera and give it a depth of 98, so it's lower than HoleCamera…

wait.. now make the matte visible only to HoleCamera via Layers... now HoleCamera can see a black field, with just a small circle with a view... If I make that black field a "zero color" like a "greenscreen" I can have Regular Camera imagry in the back, with HoleCamera imagry imposed on top.. and I do not draw the "zero color"

now there's an easy way to do that "not draw the Zero Colour".. I'm just not sure how to do that in Unit...

maybe using a "portal" would be easier

wait, Even better.. use Render Texture into a Rawimage onto a circle gameobject placed onto the sprite...

 

Several options.

• For really simple tasks, just create the sprite with a transparent hole in your art software
• For medium complexity cutouts use a Sprite Mask
• For complex systems, you are probably going to want to write your own shader. Its a complex topic, but the new Shader Graph system dramatically simplifies the process.