When generating the countertop, it is necessary to install the sink and stove first and then generate the countertop. There are two reasons for the blackening of the countertop:

1. Overlapping installation of the countertop. Generating the countertop twice will cause it to blacken. You can right-click on the countertop - select Delete;

2. Interface display reason. It appears black, but does not blacken during rendering. This indicates that it is only a display problem and the countertop is not affected.