Hi all 
Time passed since in posted here 
And i got few things to say from blender…
I went to the real-life medieval city where all are forced to wear a mask at a 38°C temperature in the shadows…
Even with this trial the walk inside the walls keeps beeing a pleasure.
I took many pics and vids at day and night and now i’m full of new infos for making the 3D grow…
When back i made a lil thingie that i though of during my trip:
Instead of popping the 3D right away when the app starts, how about making an appearing transition for the scene ?
Here’s the result. Some particles ( 10K ) and a rework of all shaders later:
Hope you like it 
Even with the numerous particles it runs smoothly ( thanks to U3D shader instancing ) and the lag you got in the gif comes from U3D throwing all things to GPU in play mode.
I’m also pretty glad i finally ( after 2 years i asked the question ? ) found a way of baking heightmaps in cycles ( as this thing worked since centuries in BI ):
I’ll have to rename the topic to ‘heightmap bake in cycles’…
Now it’s time to get back modeling the Basilic for wich i got many photos…
See you soon there with some updates
And happy blending !