Displacement Geometry Issue

[gabriele.martinacci]

Hi everybody,

I'm pretty new in Arnold and I'm stuck into this problem: when I use the Arnold parameter tag in order to obtain a correct displacement this happen:

Without the parameter the geometry is correct but I can't visualize the displacement of course:

My object have lot of polygons:

I really can't figure out where is the problem.

Thanks and sorry for my English.

[Eden_Soto2]

What does your shader network look like?

[gabriele.martinacci]

Like this... if you want more just ask.

[lee_griggs]

Why are you using a vertex map and not an image file connected to the displacement?

What does it look like when you assign the shader to a plane or sphere?

Can you upload the scene/texture?

[nwoolridge]

From your wireframe it looks like you have subdivided an original mesh, but with no smoothing, so the faceting is baked into your mesh. Look near the edges: it shows that the model is composed of "flat" 4-polygon strips of geometry. Adding subdivision with Arnold cannot fix this.

To solve this, either go back to the original lower poly geometry (if you don't have it, many apps offer an "Unsubdivide" option that will do this), or gently smooth or relax the high-poly geometry.