Great! Can you share source texture or give me a link to dataset?
I have created a thread with links to useful addon resources. The link to the maps on the MESSENGER website is located there: http://en.spaceengine.org/forum/17-631-1
I do not have the system or software to use the highest resolution map (250 m/px), which is why I used the 1 km/px map for this addon.
What software do you use for editing large image files to make maps?