User Manual

Table Of Contents
Camera
If multiple cameras are available in the connected Scene input, this drop-down menu allows
you to choose the correct camera needed to evaluate the image.
Common Controls
Settings Tab
The Settings tab in the Inspector is also duplicated in other Position nodes. These common
controls are described in detail at the end of this chapter in “The Common Controls” section.
WPP Concept
The Position nodes in Fusion offer an entirely new way of working with masks and Volumetrics
for footage containing XYZ Position channels. Z to World offers the option to create those
channels out of a Z channel and 3D Camera information. For this overview, we refer to the
World Position Pass as WPP.
What Is a WPP?
The WPP interprets each pixel’s XYZ position in 3D space as an RGB color value.
For instance, if a pixel sits at 0/0/0, the resulting pixel has an RGB value of 0/0/0 and thus will
be black. If the pixel sits at 1/0/0 in the 3D scene, the resulting pixel is entirely red. Of course, if
the coordinates of the pixel are something like -60/75/123, WPP interprets those values as RGB
color values as well.
Due to the potentially enormous size of a 3D scene, the WPP channel should always be
rendered in 32-bit floating point to provide the accuracy needed. The image below shows a 3D
rendering of a scene with its center sitting at 0/0/0 in 3D Space and the related WPP. For better
visibility, the WPP is normalized in this example.
Dierent Coordinate Spaces
Rendering WPPs can occur in different Coordinate Spaces. These include World Space, Eye
Space, and Object Space. The image below depicts how those different spaces look, although
the nodes in Fusion require the WPP rendering to occur in World Space.
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