Highly unlikely. Act-3D invests millions in R&D for raytracing and GPU optimization. They rely on license sales to fund development.

If you have a colleague with a licensed copy of Lumion, they can export a "LiveSync" package or simply send you the .LS file and you can view it for free. This is the only permanent "free" part of the Lumion ecosystem.

If you want cinematic, photorealistic walkthroughs, Unreal Engine 5 is vastly more powerful than Lumion.

If you cannot afford Lumion’s $1,500+ price tag and the 14-day trial isn’t enough, you need to abandon the search for a "free Lumion download" and pivot to legitimate alternatives. Several programs offer comparable real-time rendering capabilities for absolutely free.