There are 3 workflows to get Unreal Engine's texture (also called content) back to LightAct:
In this workflow, LightAct thrower is used to create an nDisplay viewport.
This is the most common workflow.
In this workflow, a LightAct Projector is used to create an nDisplay viewport.
This workflow is very similar to Thrower2UCam, however, it is recommended to use it only on very specific use cases.
This is the only workflow where you are not launching nDisplay from LightAct, because it relies on a specific Unreal Blueprint to share Unreal's Viewport.