Options of projectors

not sure that you mean, do you want the brush in the terrain tool be a circle? The terrain is a mesh so you will always be raising/lowering the vertices.

But if you bump up the resolution of the terrain you get more vertices to work with.

Sorry if I completely misunderstood you question and if so try and explain to me again!

So the reason why this is not circle is that from 3 pixels i cant make circle ? is this mistake on brush or on projector?

No this for a projector isn't it. I only use them for projecting caustic light effect for under water light ripples. And that's what you need to do project an image of a circle rather than limit the projector properties.

Only got intermittent web access at the moment but I know from past testing searching for unity project water caustic will show you how to project images.

Thank you, maybe somebody have idea for my problem, i modificating terrain and need to show how surface is editing. Like on terrain in unity.. but when you want to edit small surface you set brush on 2 or 3 and then isnt circle but this on picture. $$anonymous$$aybe is some other solution, i try spawn ring on my mouse position and scale with number of brush height but its not so pretty like projector

O$$anonymous$$, so you're not using projectors. I'm sorry but the terrain brushes are limited to this shape. Further individual textures will blend together so even if you did draw a big circle the edges would be blurred.

I'm not sure exactly what you're after, if you want to place a textured circle then the best way is to put a circular plane just above the terrain and drag a texture onto it.