I added smoke effects to the scene, and at night I put on the lights and exported it without the smoke effect what is the reason.
Hello ,
Thank you for posting in the community and was wondering if you are using the Path Tracer or the Raster Engine? There are some limitation with the Path Tracer with Light Haze, Volumetric Light Shaft, and weather height fog. If that is not what is happening maybe there is something else we would need to look into and you can submit a bug here: https://twinmotionhelp.epicgames.com/s/case-community-page
Kind regards,
Vincent B.