ipr_features

#Introduction What is Interactive Rendering?

PRMan's new RIS engine allows for an artist to see a realtime preview of what the final render will look like. This is called Interactive Preview Rendering, and is very similar to Cycles' live viewport feature. It is a special mode where PRMan is actively running while aspects of a scene are still being modified. Like Cycles, the sampling level can be independently set at a lower level than the main render. These settings can be found in the 'Interactive and Preview Rendering' tab.

This mode is especially helpful for creating shaders and lights, as the image displayed during the IPR session is an actual render, not a simulation or approximation.

#IPR Features It should be mentioned that not all scene edits will be immediately reflected in the IPR session. In some cases the session must be closed and restarted to see changes.

Edits that result in instantaneous updates:
*Changes to material BXDF's, BXDF parameters, and pattern nodes
*Changes in lighting intensity, color and position
*Changes in camera position
*Lights are added to scene
*Lights are deleted from a scene

Edits that require a restart:
*Changes in light geometry (size, type)
*Any changes in scene geometry. This includes moving objects, adding or deleting them, or changing settings in the displacement shader
*Changes to camera parameters such as DOF (depth of field) or motion blur