This page provides information on the IPR options rollout in the Settings tab.
||Render Setup Window|| > Settings tab > IPR options rollout
Start IPR – Opens the VFB and starts an interactive rendering.
Fit resolution to VFB – When enabled, manually resizing the VFB during rendering changes 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 is always used for IPR rendering. When disabled, IPR uses the image sampler set by the Type option in the Image sampler (Antialiasing) rollout.