Just tried another technique - use unsplited Heatmaps (8k for each material). The result is exactly the same. It turns out it’s not heatmaps.
Add. - if i connecting only _D maps - blending fine, also painting tool works. If to connect _D _N - materials not displaying, painting tool also not working.
Add. - I decided to change all textures of all materials to vector colors - works well for all 8 materials. If i blend textures _D in the “base color” and _N _R _AO in vector colors - everything also works.
Blending _D and _N as textures still failed =/
Add. - if i do opposite - connecting 8 _N maps textures and 8 vector colors as “Base color” - all works. Is it some _D _N textures overlay problem?
Add. Blending maps thruogh material attributes nodes giving same results. More then 3 blended materials = not displaying. Still looking for an answer to this…
