Free tools
GDTF Parsers
I provide a free set of executables to parse data from a GDTF file, in order to create the tables and images needed to create a moving light that represents a real light. Certain things were never developed by Epic Games, but this will get you through most rendering and previs projects.
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This page is ready for screenshots covering GDTF input files, parser outputs, generated CSV tables, generated images, and where each output goes in Unreal.