How do you blend normal maps in Vray / 3DS Max?

[JD3D_CGI]

I want to use a black and white noise to have different areas of normal, but I'm not getting any results.

[vladimir_krastev]

Hi, thanks for posting. Could you share a bit more details about your setup? Could you send us an example scene or a screengrab of your material?

[vladimir_krastev]

Hi, I did a few experiments. If you "blend" two normal maps with for instance checker it works. But if you try to blend using gradient the result is not usable.
The scene is attached with both checker and noise for blending. If you adjust the noise to have very high contrast so it is basically black and white areas it will work as well.