When there are shadows flickering on the countertop, there are the following 2 reasons:

First: The countertop installation is overlapped. Generating the countertop twice will cause it to turn black. Right-click the countertop with the mouse - select Delete;

Second: The cabinet overlap causes it. You can operate according to the following steps;

Step 1: Right-click the countertop with the mouse and select Delete;

Step 2: Delete the overlapping cabinet and re-place it;

Step 3: Press and hold the Ctrl key and left-click the mouse to select multiple cabinets at the same time;

Step 4: Select the style and material of the front and rear water barriers, and click OK.