Firondoiel This does happen on certain integrated graphics chips in DirectX 9 mode. So try switching to DX11 mode instead. How to do so is covered here:
DirectX 11 (DX11) for The Sims 4 - A Step-by-Step Guide | EA Forums - 11811172
If that doesn't help, please provide a dxdiag. Click Windows key-R, enter dxdiag in the run box, wait for the scan to finish, click "Save all information," and save the file to your desktop. From there, you can attach it to a reply using the paper clip (Attachment) icon included with the other formatting buttons.