Hey Alexey,
Basically, the workflow has been :
For the highpoly (HP)
- generating a HP mesh using depth map,
- working on topology via Instant Meshes,
- building a 10k diffuse map on this HP based on images with a generic mapping mode,
- building a 10k normal map based on the HP with keep UV as mapping mode,
- exporting this two maps based on the HP.
capture of the result 2019_12_04_diffuse_map_hp.PNG
For the lowpoly (LP)
- duplicating the HP then decimating it to get a 3k vertices LP
at this point, generated maps have vanished
- building a 10k normal map on this LP based on HP with a generic mapping mode,
- building a 10k diffuse map on this LP based on HP with a generic mapping mode.
capture of the result 2019_12_04_diffuse_map_lp_based_on_hp.PNG
To make sure their is a difference
- duplicating the 3k vertices LP
- building a 10k diffuse map on this LP based on images with a generic mapping mode.
capture of the result 2019_12_04_diffuse_map_lp.PNG
So I managed to build a diffuse map on a LP based on the normal map of a HP. Their is so far a little value in doing this when you compare 2019_12_04_diffuse_map_lp_based_on_hp.PNG & 2019_12_04_diffuse_map_lp.PNG, but the time spent using this workflow is too long for the result. But I'll try to look forward to improve it.
In the meen time, if you have suggestions...
Cheers
Gabriel