Thanks guys!

By Francissimo
I see you are using something like an hillshade for topography, it works well!
That's a desaturate/contrasted combination of layers. Same "basis" as before, but with different effects.

By Mouse
Looking at Mars maps is always fascinating - all those 'can't be natural' straight lines that run for thousands of miles, and an impossibly large volcano... but when you map it Ilanthar it literally comes to life!
Well, I agree that Mars has very interesting features! If I find a good method, I'll have all Venus & Moon in the same setting to do...

By Johnvanvliet
if you want lines
i cleaned up / repaired some old maps and remapped to simple cylindrical
-- 1600+ to current
Thanks for the ressources. I'm gonna keep the same basis as it is very big and detailed.

I reworked it to center it more .
Not sure about the layout... Else I keep only the Valles Marineris Territory or the whole thing. I will add some details in the bottom right, surely.
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Which one do you prefer?
I'm also thinking about adding some contour lines to indicate topography.