Render Artifacts With Vop Displacement

[vrljc]

I am getting strange render artifacts with my VOP displacement shader. This is what it looks like:

Anybody seen this before and would know why this is happening and what I can do to fix it?

Here is the .hip file if you want to look at the VOP network.

Jon

[stevenong]

Hi Jon,

Try turning on Displace Bound for the model Object. The parameter can be found under the Render tab of the object.

The value should be equal or more than the displacement value you're using though sometimes, it could be less. However, you don't want to make the value too big else mantra will take a longer time to render. I usually channel reference the value from the displacement shader & put an abs() function to make the value always positive.

Cheers!

steven

[Jason]

Try turning on Displace Bound for the model Object. The parameter can be found under the Render tab of the object.

:alien1: If you enable verbose output, you'll get a message from mantra telling you what the maximum displacement it found during the render. But if you're attentive and know the ranges of your displacement vop (the noises all have different ranges, btw) then you can always make a more educated guess as to the limits.

:alien1: :alien1: If you want to enable verbose output under Windows and wonder where the hell the output ends up, try this on the Command parm in the Mantra ROP: mantra -V 4a -o consolenowait

Hope this doesn't harm

Jason