Hyperion NG might offer a fully open source ambient light with DMX fixtures in my opinion. For people interested I want to roughly point out how this COULD work: 1. Setup Hyperion NG and use the E1.31 (sACN) as device. (DMX over network - we'll stay on the same machine - no network hardware necessary, but possible) 2. Use OLA (Open Lighting Architecture) to receive the network traffic and feed it into a universe where a USB to DMX dongle (hardware) is patched as output. I don't know if this works, but I'll try to find out.