Autodesk 12812-051462-9011 User Guide 3 - Page 1150

Object Level When on, projects from the object level of the high-resolution object. Default=on. ■ Put to Baked Material (The default.) When chosen, the object-level projection is rendered in the baked material. Sub-Object Levels When on, uses the active sub-object selection, and makes the Mapping Coordinates group > Sub-Objects controls available. Default=on. ■ Put to Baked Material When chosen, the sub-object level projection is rendered in the baked material. The following options apply to sub-object rendering, when only a portion of the geometry is being rendered to the normal bump map: ■ Full Size (The default.) When chosen, the size of the normal bump map is the same as if all geometry were being rendered. ■ Proportional When chosen, the size of the normal bump map is fitted to the size of sub-object selection. The Proportional Multiplier on the Projection modifier's Reference Geometry rollout on page 1633 can change the default size of the proportional map. For example, consider a plane that is 4 segments x 4 segments. Each "poly" in the plane is a separate sub-object, for a total of 16 sub-objects. If the output Map Size is 64, the object rendering output is 64 x 64 pixels. If Full Size is chosen, each sub-object rendering is also 64 x 64 pixels. If Proportional is chosen, each sub-object rendering is 16 x 16 pixels. If you change Proportional Multiplier to 2.0 in the Projection modifier, each sub-object rendering is now 32 x 32 pixels. Mapping Coordinates group Object These controls are for basing the rendered texture on the object level of the source object. ■ Use Existing Channel When chosen, unwrapping uses an existing map channel. ■ Channel When Use Existing Channel is active, lets you choose the channel to use for unwrapping. ■ Use Automatic Unwrap (The default.) When chosen, uses automatic unwrapping, and applies an "Automatic Flatten UVs" (Unwrap UVW) modifier on page 1841 to the objects whose texture is being rendered. Render to Texture Dialog | 6405