Ok, today we are going to create some kind of interior illustration.

So let's get started.



As usual you will have to create a document and a new layer.



Then apply a rounded gradient on it.



It will be better if you create a copy of our key layer.



Maybe to use some filter now. Let's say the Crystallize filter. To ascend the edges.







Switch to magic wind tool if I'm not mistaken with the name here.

The goal here is to select the whole Yellow.

PS: In Ps you can do it in many ways.







Tap to add the color - the one with the +.







It is selected now.