Hi Willesa,
There is a way to create custom shapess using countertops and because of this you can create a ‘custom cutout’ as well. Place a countertop on the floorplan and then you can right click on it and use ‘edit shape’. With the ‘edit shape’ tool, you can add points and add lines to try and create the exact cutout you need! For example, I was able to create a cutout of a star in a countertop. I have attached some images, one of the floorplan and rendering and another showing all the points I had added to get the shape I needed.
Click HERE to check out an article explaining out to edit countertops.
If you wanted to create custom cutouts on walls, then you can use multiple cut outs to create the shape you need. In my example, I used 1 rectangular cutout and 3 half round cutouts. See image below.
Hope this helps!
Kris 🙂