We have replied on the same email that you have used to open a new ticket - I could post the address here if you want.
The setup with the MixMap is working correctly on all geometries that we have tested here - but for some reason it doesn’t work on your geometry.
Is this geometry imported from somewhere - can you test the same setup on your side but on geometry created by 3DSMax ?
As a workaround you could prepare two separate materials - one with noise-bump and another one with edge-texture-bump and mix them through VrayMlendMtl - I have tested this here and it worked fine.
Here is the scene with the above setup :
Edge_texture_not_blending02.zip (1.09 MB)