Hello,


what is the ipr viewer and how can I activate or see it?


thx

well… ipr lets you use accelerated rendering by caching part of render data, which won't change during some tweakings of your scene. For expamle playing with colour of light, dimmer or its position does not change displacement of your geometry, so there is no sense to recompute it after such change. Insteed of that, ipr uses a cached data and render only colour component of the surface, which is of course much faster.

Go to your ROP driver parameters tab and turn on ipr rendering at the very top of this tab.

As I understand (not sure of that) you can work with ipr both in standard viewer or its ipr version. Only difference is a workflow. In ipr viewer you see your changes immediately. In standard viewer you have to push render buttom.

Make tests! Render your frame few times changing some parameters with and without ipr. Turn on Verbose in Mantra (mantra -V 1) and you will see advantages of IPR. (which is quite common out there…)

Remeber to post your suggestions/comments about it in the Houdini 8 Early Access forum!