Render options can be defined separately for both a render pass and the render region. A render pass and the render region can have completely different render options or, conversely, can have identical values so a rendering in the render region looks exactly like your final render.
These options include settings such as the rendered file name, format, frames, antialiasing levels, effects (such as motion blur and global illumination), the rendering algorithm, and control over things like motion blur and shadows.
Global-render settings are defined separately for each render pass; for example, you can define separate settings for highlight, matte, and shadow passes.
For some effects to be rendered, you must set global-rendering options. For example: for shadows, you first set rendering properties for the appropriate light, then set rendering properties for the objects you want to cast shadows, and finally set global options to render shadows on a particular pass.
• For details on how to set render options for your render pass, see Pass Rendering Options.
• For details on how to set render options for the render region, see Setting Render Region Options.
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