LocalMuseAI/coreml-dreamshaper-8-lcm-6bit-v2

DreamShaper 8 LCM — LocalMuse Core ML

A reproducible Core ML conversion of Lykon/dreamshaper-8-lcm for on-device image generation in the LocalMuse iOS app.

This is a format conversion, not a retrained model. Lykon remains the creator of DreamShaper 8 LCM. The UNet uses Apple 6-bit k-means palettization; the matching CLIP text encoder and both VAE directions remain FP16 to preserve prompt and image fidelity.

Pinned source

• Repository: Lykon/dreamshaper-8-lcm
• Revision: 4645d8bc6a8e6b106d21606d63e8460cdad4f1a6
• Checkpoint: DreamShaper8_LCM.safetensors
• Size: 2,133,804,992 bytes
• SHA-256: a4f3e1526c5dc4fcbe342f5c410d83ae202c7a415fcefcbb92e0f93fcd0a87c3

The SD 1.5 component configuration and tokenizer are pinned to stable-diffusion-v1-5/stable-diffusion-v1-5@451f4fe16113bff5a5d2269ed5ad43b0592e9a14. No additional LCM LoRA is fused because the source checkpoint is already LCM-distilled.

Conversion

• Apple ml-stable-diffusion revision: e12202c1f6405b83918b58a5d097cd61e3e1f702
• Attention: SPLIT_EINSUM_V2
• UNet: 6-bit palettized, monolithic [2, 4, 64, 64] -> [2, 4, 64, 64]
• Text encoder: FP16 [1, 77] -> [1, 77, 768]
• VAE encoder and decoder: FP16, native 512×512
• Minimum compiled deployment target: iOS 17

A deterministic source-to-compiled comparison produced:

• UNet: correlation 0.99994064, relative RMSE 0.011402
• Text encoder: correlation 0.99999909, relative RMSE 0.001342

PROVENANCE.json authenticates every source and generated artifact. Every downloadable file is also independently pinned by size and SHA-256 in the LocalMuse catalog.

Recommended settings

DreamShaper 8 LCM must run with an LCM scheduler:

• Steps: 5–15 (default 10)
• CFG scale: approximately 2
• Resolution: 512×512

As noted by the original author, LCM is optimized for speed and has lower maximum quality than the full DreamShaper 8 checkpoint.

License and attribution

The converted weights remain subject to the included CreativeML Open RAIL-M license and all use-based restrictions. See the original DreamShaper 8 LCM model card for upstream attribution and model information.

The files were modified from the source by conversion to compiled Apple Core ML format and by 6-bit palettization of the UNet. No additional usage restrictions are imposed by this repository.