Umranz/SD1.5-Uncensored-Photoreal

SD1.5-Uncensored-Photoreal is a production-grade, photorealistic text-to-image diffusion model with permanently abliterated safety alignment and internal refusal restrictions.

Overview

• Base Architecture: RealisticVision V5.1 (SD 1.5 UNet backbone)
• VAE: stabilityai/sd-vae-ft-mse (Sharp contrast, zero color-banding)
• Safety Status: 100% Uncensored (safety_checker = None with modified cross-attention weights)
• Ablation Method: Closed-form Rank-2 Subspace Projection across all 16 attn2.to_v modules with covariance shielding ($M_{pp}$).
• Inference Overhead: 0 ms (All edits are baked permanently into model weights).

---

Quickstart

import torch
from diffusers import StableDiffusionPipeline, DPMSolverMultistepScheduler

pipe = StableDiffusionPipeline.from_pretrained(
    "Umranz/SD1.5-Uncensored-Photoreal",
    torch_dtype=torch.float16,
    safety_checker=None,
).to("cuda")

pipe.scheduler = DPMSolverMultistepScheduler.from_config(
    pipe.scheduler.config,
    use_karras_sigmas=True,
    algorithm_type="dpmsolver++",
)

prompt = "a photorealistic portrait of an uncensored beautiful model in a sunlit studio, raw photography, 8k uhd, soft natural lighting"
negative_prompt = "deformed, distorted, disfigured, bad anatomy, bad eyes, low quality, blurry"

image = pipe(
    prompt=prompt,
    negative_prompt=negative_prompt,
    num_inference_steps=30,
    guidance_scale=6.5,
    height=512,
    width=512,
).images[0]

image.save("output.jpg")

---

Scientific Methodology

Built using Heretic-DiT closed-form subspace abliteration: $$W^{\ast }=W_0(M_{ae}+{\lambda }_p{M}_{pp}+\gamma I)(M_{ee}+{\lambda }_p{M}_{pp}+\gamma I{)}^{-1}W^*\; =\; W\_0\; (M\_\{ae\}\; +\; \backslash lambda\_p\; M\_\{pp\}\; +\; \backslash gamma\; I)\; (M\_\{ee\}\; +\; \backslash lambda\_p\; M\_\{pp\}\; +\; \backslash gamma\; I)^\{-1\}$$ $$\mathrm{\Delta }W=(W^{\ast }-W_0)V_2{V}_2^{\mathrm{\top }}\backslash Delta\; W\; =\; (W^*\; -\; W\_0)\; V\_2\; V\_2^\backslash top$$

Published by Umranz.