Hello, the fillers, decorative lines and metal lines can be selected and designed in the tile and ceiling customs. The detailed operations are as follows:

Method 1, Tile Custom

The lofting lines can be used to create the background wall. After drawing the required graphics, right-click on the lofting, select the required lofting shape, and then click on the lofting to replace the material;

Method 2, Wall Custom Steps are shown in the screenshots as follows:

1. Draw graphics or paths through rectangles, polylines, etc. The drawn polylines can be stretched and modified in size by clicking the "T" key;

2. Click on the drawn polylines, select the Filler in the toolbar, open the section editi interface, and search for a suitable edge trim to place from the left library.