December 16, 2014, 12:09:07 am
Lumion can only access one GPU to do the rendering. Multi-GPU/SLI has been investigated in the past by the developers.
You can however, have one GPU dedicated to Lumion, and doing renders, and another GPU for other tasks, if you run with two screens, one for each GPU. That is done via the cards Control Panel settings. This is used by some users, to date I am only aware of users with NVIDIA cards such as a Titan and GTX 660.