If you see "triangles" or flickering, your GPU might not fully support the Turnip version you selected. Switch to a "Stable" Turnip build rather than an "Experimental" one.

Applying the correctly is the difference between a running game and a corrupted container. Follow this guide meticulously.

If you used a patch that includes a configuration tool (like DGVOODOO or DXWnd wrapper), you need to tweak it.