This add-on will give you real level 7 topography and level 8 surface textures for Mercury. Colors were computed to match the planet's natural appearance.
I've included an updated Mercury.cfg to load the 3D terrain. This will overwrite the default configuration, so backup if needed.
This is my first Orbiter 2016 addon and the entire surface/terrain conversion process is still a bit rought.I worked based on 8bit 4096x2080 altimetry since my PC can't handle more.If there was no mistake on my part the altitudes should be OK, though.
All credit goes to the scientists and institutions that really worked to get this data in the first place. See the docs for original image sources and credits.