Displacement disappearing

[JakobAppleby]

I have this text imprinted on a simple geometry, im using a simple texture to displace it and everything is fine up until frame 277 where suddenly the displacement is gone.

I tried rendering out the texture that gets fed into the displacement straight to the beauty output of the shader and it shows it correctly.

The texture is using a cubic projection. And the gold text over is a stacked material with displacement, but that doesn't seem do affect it in any ways

Please see attachment where you first see the render that has 2 frames right and then the displacement is gone, then you see the texture of the displacement

(Problem is the same on gpu/cpu)

https://www.dropbox.com/s/ruq7tga9jz5s8ah/displacementproblem.mp4?dl=0

edit: It almost seems like it has something to do with it being rotated in space, had a previous version where it never got to the rotations it has now, and didnt get that problem

[Stephen.Blair]

Did you check the Arnold log?

[JakobAppleby]

Yes, but now that you mention it i did not change it to debug mode. Might say some

Edit: Nah nothing

[Stephen.Blair]

Debug is rarely necessary. Info is usually enough

[JakobAppleby]

Well i thought it had something to do with the cubic projection, and i fixed it by using a flat projection. dont know why the cubic one bugged out on the rotation, while the texture would still be correct

[peter.horvath6V6K3]

I'd take a look if you could send me the scene.

[JakobAppleby]

To reproduce this; First have the object rotated less than 44 degrees on Z and see that the displacement works. Then change it to 46 or more degrees and start the IPR again or render again.

https://www.dropbox.com/s/w3kiarssx75dgux/displacebug.rar?dl=0

(couldnt upload a zip here)

[peter.horvath6V6K3]

Got it, thanks. I'll investigate and keep you updated.

[peter.horvath6V6K3]

I've found the problem, will be fixed in the next release. Thanks.