Displacement issues

[chadstevens]

There seems to be a displacement inconsistency with Vray compared to just displacing the mesh in Houdini and I can't figure out why.

I've displaced a mesh with the Cd attribute from a displaced ocean surface and a separate grid with the color loaded into a Vray image file and then into a displacement node. but the differences are very noticeable.

Here is an example of what I'm talking about, this is causing a problem because I'm trying to match a flip sim to the displaced surface, but with the difference in displacement I can't get it to work. I've also attached a scene to make it easier to debug.

[chadstevens]

So after further investigation, it looks like the reason is because Houdini displacement works like this:

RED = X Axis displacement
GREEN = Y Axis Displacement (Vray does this as well)
BLUE = Z Axis Displacement

So Vray vector displacement is doing something different because if I remove the Green and Red Channels there is still displacement on the Y axis and that's the same for Blue and Green.

I can't seem to get Vray to displace the mesh on the X or Z axis, I've tried all the vector modes.

Is this a Bug or am I missing something?

[chadstevens]

Okay, I'm an idiot, the problem was I had Vray sub div properties on my geometry node and it was overriding my material displacement settings where I was making all the changes.

[viktor_angelov]

Hi chadstevens Thank you for letting us know you have figured it out. Enjoy your time with V-Ray