Has anyone done partial fine-tuning on Flux.2 Klein 4B to enforce a consistent art style?

Hey, I’m trying to push Flux.2 Klein (4B Base) beyond LoRA-style adaptation and move into actual model-level style control. What I’m aiming for is not just adding a style on top, but making the model default to a specific visual language, consistent lighting, line work, atmosphere, and overall “world feel” (think visual novel / noir environments with coherent lighting across scenes). I’ve already worked with LoRAs, but they still feel like overlays. The model tends to drift depending on prompt complexity, and I want something “baked in.