True Displacement Disabled vs Bump

[benderonline 2]

I'm curious about the displacement vs the bump settings in Houdini's principled and mantra surface shaders.  Is there any difference between bump and displacement with 'True Displacements' unchecked?
 

[anim 1,262]

in terms of what they do, no

they both just alter the normals, you can however use both and bump/normal map will be applied on top of displacement normals, since internally, exported displacement normal alters surface normal and that is later altered with bump/normal  map

 

 

Edited May 5, 2016 by anim

[benderonline 2]

Thanks for that! That's what I figured, and what I'd seen in the network - but I'm not a smart man, so I like to check these things..

Cheers!