I am using PyMOL to visualize contact residues between the TCR CDR regions and the MHC/peptide. I am currently running into an issue with surface coloring that I haven’t been able to resolve. My goal is to generate a figure similar to the attached example. . where the MHC surface is shown in a uniform light gray and the contact regions are color-coded based on the interacting CDR regions. To do this, I first selected only the MHC surface and colored it gray95. After that, I selected the MHC contact residues and applied different colors corresponding to the CDR regions. However, even after setting the MHC surface to gray95, I still see residual green, red, and blue coloring along the inner edges of the surface. I have tried multiple approaches to remove or override this internal edge coloring, but I haven’t been able to eliminate it . This color might be confusing because I plan to color-code the MHC surface and peptide sticks, and the existing internal colors could be confusing or misleading in the final figure. Any idea or suggestions to resolve this?