To render a 3D model in Stable Diffusion, convert the model to a 2D spatial map (like depth or normal), then use Stable Diffusion’s image-to-image feature with a prompt to generate the final result.
Stable Diffusion processes 2D inputs—exporting your 3D model (e.g., from Blender) as a depth/normal map retains its shape, so the AI can add details, colors, or styles based on your text prompt.
For a simple workflow: Export a depth map from Blender, upload it to Stable Diffusion WebUI’s “Image to Image” tab, add a prompt (e.g., “a cyberpunk robot with neon lights”), and set Denoising Strength to 0.5–0.7 (balances 3D structure with AI style).