D5 Sync doesn’t work in Cinema 4D 2026. It completely disappeared from extensions menu.
Also I would like to report that D5 Sync has serious issue with importing normal map. Generally in Cinema 4D normal map is first connected to Bump Node that is connected to material Bump/Normal input. D5 Sync plugin doesn’t recognize that Bump Node and normal map is not imported. D5 Sync should read normal map that is connected to Bump Node - not Bump material input.
This is underexpectation since the material set in the screenshot is RS (Red Shift) series material, and there is currently no support for reading the map of the bump node. Relatively, we support reading bump maps for OC series materials, which may be the requirement you’re looking for. You can test OC + C4D2025 and see if the results are normal.
Problem is that Octane is external, paid renderer where Redshift is native built-in in Cinema 4D. I think that Redshift should be prioritize because of that if D5 Sync is called “for Cinema 4D”