Thanks for all this positive feedback.
Quotenon-traditional printing treatment like Gum Dichromate
You right here, the post work i did with with the float output is really close from what append in a Gum Dichromate process.
First i ve made a black and white image tweaking color balance just before the desaturation process. Them i mix the result with an overlay blending mode to the original render. At last i ve added the direct lighting pass to the composite to give more crunchy highlight.
QuoteIs the terrain a native terragen or a imported elevation map
It's all native terragen but 1 more compute node to get the right normal all along the terrain generation.
QuoteAlso your cliffs displacement/texture is great. Is this done with the vector displacement and some image maps
No, only powerfractal plug into surface node + voronoi noise. I'm using a lot vertical or lateral displace option in surface node displacement tab.