edit: Problem solved
Hi, I did all my textures on painter, I bake the normal map on my low from a high with bevels.
On painter everything looks good so I'm doing my textures and exporting everything.
But on blender the result is awful
I then decide to test a triangulation and the result is much better but not perfect
then I test to remake the bake of my normal map from blender and there the result is almost perfect (as good as what I saw in painter)
Then I try to import this new map in painter to see what it gives and it's as bad as the painter map in blender (after triangulation)
you can see here the minor differences between the 2 maps:
My conclusion is that the two programs do not bake in the same way and their way of baked is well rendered by their own engine but is not necessarily good elsewhere?