Local GLM 5.3 Flash Model Used to Generate Functional Minecraft Black Hole Mod
A Reddit user demonstrated using a 4-bit quantized GLM 5.3 Flash model running on local hardware to code a custom black hole rifle mod for Minecraft using the Fabric API. Through interactive human-in-the-loop prompting and multimodal image inputs over 9 hours, the model generated 7.6 million output tokens to implement custom weapon mechanics, particle visuals, and terrain destruction. This demonstration highlights the practical capability of open-weights local LLMs in complex game modding when paired with visual references and human guidance. It shows that developers can build intricate game software with custom physics and graphics without relying on cloud-based proprietary AI APIs. The model ran locally on four rented RTX PRO 6000 workstation GPUs via atomic.chat, achieving an average decode speed of 96 tokens per second. Early text-only iterations produced weak black hole effects, prompting the developer to feed reference images of space phenomena to help the multimodal model generate shrinking light rings and massive crater explosions.
## BACKGROUND
GLM (General Language Model) is an open-weight large language model architecture capable of processing multimodal inputs like text and imagery. Quantization techniques such as Q4 compress model weights to reduce VRAM memory usage, allowing larger models to run efficiently on specialized local hardware. In Minecraft modding, the Fabric API provides a lightweight framework that allows developers to hook into the game's codebase and register custom items, entities, and rendering visual effects.