This page provides information on the IPR options rollout in the Settings tab.
The IPR Options rollout is accessible through the Settings tab of the Render Setup window. These options determine the behavior of Interactive Production Rendering (IPR) in the V-Ray Frame Buffer.
Fit resolution to VFB – When enabled, manually resizing the VFB during rendering will change the rendering resolution that IPR uses, making the resolution match the newly resized window. When disabled, the IPR resolution is locked to the resolution set under the Common tab even if the VFB is resized.
Force progressive sampling – When enabled, the Progressive Image Sampler will always be used for IPR rendering. When disabled, IPR will use the image sampler set by the Type option in the Image sampler (Antialiasing) rollout.