OUTPUTLOOKUP

THE BOX'S MAIN HELP:
This lets you return the color for a given pixel x/y position.
This must be part of an OutputStart -> OutputEnd chain.
Currently, pixel filtering is not supported :(

X (input):
The X position [0.0 - 1.0] for the pixel returned.

Y (input):
The Y position [0.0 - 1.0] for the pixel returned.

FLT (input):
No filtering is current supported :(
In the future, this will support box and gaussian filtering.

C (output):
OUTPUT SHADER use only.
This is the returned color for the specified pixel.

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