User Manual

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Unseen by Cameras
If the Unseen by Cameras checkbox is selected, the object will be visible in the viewers but
invisible when viewing the scene through a camera, so the object will not be rendered into the
output image by a Renderer3D. Shadows cast by an Unseen object will still be visible.
Cull Front Face/Back Face
Use these options to cull (exclude) rendering of certain polygons in the geometry. If Cull Back
Face is selected, all polygons with normals pointing away from the view will not be rendered
and will not cast shadows. If Cull Front Face is selected, all polygons with normals pointing
away from the view will likewise be excluded. Selecting both checkboxes has the same effect
as deselecting the Visible checkbox.
Ignore Transparent Pixels in Aux Channels
For any piece of geometry, the Renderer3D rejects transparent pixels in the auxiliary image
channels. The reason this is the default is to prevent aux channels (e.g., normals, Z-channel,
UVs) from filling in where there should be blank space or full transparency. For example,
suppose in post you want to add some fog to the rendered image. If you had fully transparent
geometry in the foreground affecting the Z-channel, you would get incorrect fog rendering. By
deselecting this checkbox, the transparency will not be considered and all the aux channels will
be filled for all the pixels. This could be useful if you wanted to replace texture on a 3D element
that is fully transparent in certain areas with a texture that is transparent in different areas; it
would be useful to have the whole object set aux channels (in particular UVs).
Adding FBX Models
The Filmbox FBX format is a scene interchange format that facilitates moving 3D scene
information from one application to another. Fusion’s FBX format support extends model import
support to other 3D files such as Collada and OBJ.
Importing an FBX Scene
To import an entire FBX scene, you add an FBXMesh3D node to your node tree. After being
prompted to choose a scene or object file, Fusion imports it to create a composition with the
same lights, cameras, materials, and geometry found in an FBX file.
An imported model, via the FBXMesh3D node.
Chapter – 76 3D Compositing Basics 1576