Black Forest Labs released FLUX 3 Image Klein on October 15: 5.6B parameters, native 4K and up to 10 reference images, with an INT8 version that officially runs on 8GB NVIDIA cards. Compiled from official sources: pros and cons, which files to pick for your VRAM, a five-step ComfyUI install, settings, using it for traditional Chinese painting and print upscaling, and what the FLUX Kommunity License allows commercially.