Do you have a pdb ID for the protein you wish to display?

To match both the lighting and the matte finish of the surfaces, fine-tuning of various lighting and reflectivity settings is needed. This is most easely done using the Lighting setting Plugin: https://github.com/schrodinger/pymol-open-source/blob/master/data/startup/lightingsettings_gui/main.py, which allows you to control each of the relevant settings through a slider