Autodesk 12812-051462-9011 User Guide 3 - Page 827

and so on. Also, unlike Selected, which replaces the entire contents of the Rendered Frame Window (except for selected objects) with the background color, this option replaces only pixels used by the re-rendered selected objects. Subset pixel rendering is particularly useful when performing iterative rendering and refinement of lighting, shadows, and other scene elements for a particular object or set of objects in the scene. It lets you re-render repeatedly to view the results of isolated changes without disturbing the rest of the rendered output. TIP Objectionable outlines might appear around objects rendered in Subset Pixel mode at low antialiasing settings. To eliminate any such outlines, increase the antialiasing setting on page 6083. For best results, use Medium antialiasing (Min 1/4, Max 4) or better. The equivalent Render Setup dialog control is Render changes to selected objects only on page 6281. Reuse group These commands let you save rendering time by reusing translated geometry and final gather solutions. The Final Gather controls are available only when Final Gather on page 6081 is on. Lock Geometry Translation Determines whether changed geometry is retranslated to mental ray format at render time. When on, sub-object-level changes such as vertex editing or adjusting a modifier such as Bend are ignored and don't cause retranslation. However, object-level changes such as moving or rotating an object are retranslated. The equivalent Render Setup dialog control is Translator Options rollout > Geometry Caching group > Lock Geometry Translation on page 6321. Geometry When on, rendering uses geometry caching. During the first render, the translated geometry is saved to the cache file. Then, in subsequent renderings of the same scene, the renderer uses the cached geometry for any unchanged objects instead of retranslating it. Any changed geometry is retranslated. Default=off. The equivalent Render Setup dialog control is Translator Options rollout > Geometry Caching group > Enable on page 6321. NOTE Network rendering does not support this option. 6082 | Chapter 20 Rendering