![]() When running IPR in "It", objects or their materials can easily be selected from the render. The camera listed in the Render Settings window is used for batch rendering. The popup menu from the IPR button also allows selection of a particular camera. IPR and preview renders typically uses the camera from the active viewport panel. "It" is the default for both preview and IPR, because it offers better performance and more features, but you may prefer to use a docked Render View panel for IPR. There is a separate display preference for preview rendering. In the RenderMan section of Maya's Preferences Window, you can choose whether IPR should use Image Tool (It) or Maya's Render View. Zero threads means all processors will be used for rendering. It's advised to leave at least one thread to allow for interactivity in Maya while rendering is underway. The default value of -1 means that all but one CPU will be used for rendering. In the threads section of the RenderMan Preferences, the Rendering Threads setting is used for both Preview and IPR renders. The Render View has a button in the top right corner for stopping IPR. There is also a cancel button in "It" that works to stop IPR. ![]() When IPR is running, it can be stopped from the popup menu of the shelf button. The IPR button offers a menu with some convenient options for starting up with a particular camera or resolution. The only difference is that the button in the RenderMan shelf always switches to RenderMan before starting a render. The usual methods in Maya for starting IPR also work. ![]() Interactive Preview Rendering can be started by clicking the IPR button in the RenderMan shelf. Note that IPR clamps trace depth to 1 diffuse bounce and 2 specular bounces you can change this in the Advanced Controls, IPR menu Starting IPR ![]()
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