Problems with round lines

[panzi27]

Hi, i’m trying to draw an alien planet, like all the planets it has a night side on its.

i don’t know how to apply a round border for draw a perfect round dark part of the planet without going out from the border.

[c.pfaffenbichler]

Please post a screenshot including the pertinent Panels (Layers, Options, …).

One can use Vector Masks, Layer Masks and Clipping Masks to limit the visible regions on a Layers.

[D.A.R · Accepted solution]

Try Inner Shadow from the layer styles.