Hi.

I wonder how would I generate in zbrush a normal map from already constructed lowpoly and highpoly meshes. I cannot find a way to explicitly replace a second subdivision with the high poly mesh and replace the lowest subdivision with the lowpoly one. Or what technique is used if I would want to generate normal map from external highpoly to external lowpoly in zbrush?

Or what technique is used if I would want to generate normal map from external highpoly to external lowpoly in zbrush?

You wouldn't use zbrush for this. Take a look at xnormal if you want to bake a hi-poly to a low-poly.

Thanks! Works great, adaptive seamless normals just like from z brush!

You just knew what I needed! Thanks