LLM fine-tuning with LoRA + NVFP4/MXFP8 on NVIDIA DGX Spark (Blackwell GB10)

LLaMA-Factory FP8 training environment for NVIDIA Hopper GPUs. Fixes common configuration issues causing 2x slowdown with FP8 mixed precision.

GEN3C: Generative Novel 3D Captions - Adapted for NVIDIA Blackwell GPU architecture (sm_120). Includes automatic GPU detection, CPU-based T5 text encoding for Blackwell compatibility, and full backward compatibility with older GPUs.