Hi Pablo Arantes,
Thanks for trying out DSSR and your kind words about it! Note that DSSR is still in beta, and I welcome user feedbacks to guide further refinements of the software.
Regarding the texture on ribbon rendered with PyMOL, I understand what you mean from the attached figures. I honestly do not know how it comes out that way when a blocview generated .r3d file in fed into PyMOL -- I've actually thought that it is an artifact!
I will try to reproduce the 1msy schematic image with texture in ribbon, and post back details for your reference (hopefully by tomorrow).
Xiang-Jun