Thanks very much Alexey. i understand now.
well, i suppose i don't need to calculate their colors ... For what purpose would i need it actualy ?
i just need to generate a mesh, and later the texture.
i suppose that what will be displayed will simply be the sparse cloud anyway.
I think that in the early stages of calculation, photoscan estimâtes the time for the best, but it varies a lot. This time it started with about 20 days, then reduced down to 1 day and 10 hours. Now it's at 3 days estimated ...
i disabled the filtering and required the ultra high setting, to get the most defined scan. i trust my 8k photos, their definition, and the kind of surface which is all sculpted stone. The whole thing into a soft shadow, so ideal.
i hope it'll go fine, since i've never calculated such huge and long scan before.
1024 x 8k photos, it took 10 hours to align the cameras.
one 5820k
one gtx titan ( early one )
one gtx 1080 ti