Hello, if you need to create a design for the wall surface, you can refer to the following steps:

1. Enter the ceiling custom, click on the wall surface, and select "Background Wall Design

2、Click on the white area, select the shape you need to draw. For irregular shapes, choose the polyline option; ensure the lines are closed, with the start and end points connected, to create the area.

3、右击线条，转化为区域，改离墙距即可。