Thank you for sharing!
I think there is a problem with scale because the model in UE is much to small. Also, in LightAct the coordinates of the 3D model are not 0 and in UE there are.
Here’s what I did (I guess it’s a useful procedure so I’m describing it in full).
In LightAct, I moved the model to 0,0,0 and I inserted a box primitive and put it next to the model.
Projector output looks like this:
Then I inserted a cube primitive in Unreal and placed it at the same position adjusted for different coordinate system.
You can already see that the scale of the city model is wrong.
If I package the project and run it through nDisplay Launcher I get the correct perspective for the box
If you compare this image with the image of projector output from LightAct, you will see that the perspectives for the box match.
Then, I went back to UE Editor and set the scale of the 3D model to 10 and re-packaged it.
This is the output.
Now if we compare the output from nDisplay with the output from LightAct you see that there is a match.
Let me know if this helps.