<div data-youtube-video><iframe width="640" height="480" allowfullscreen="true" autoplay="false" disablekbcontrols="false" enableiframeapi="false" endtime="0" ivloadpolicy="0" loop="false" modestbranding="false" origin playlist src="https://www.youtube.com/embed/kSHNnj5sCyo?rel=1" start="0"></iframe></div><p></p><p>GOONERS REJOICE<br /><br />LTX-2.3 Sulphur (NSFW MODEL) Distil Workflow — Installation Guide</p><p>This workflow runs on smthemex's <code>ComfyUI_LTX2_SM</code> custom node pack with the <code>sulphur_distil</code> distilled transformer GGUF. Below is everything you need to install before queuing the workflow.</p><hr /><h2 id="1.-custom-nodes">1. Custom Nodes</h2><p>Open a terminal in your ComfyUI <code>custom_nodes</code> directory and clone:</p><pre><code>git clone https://github.com/smthemex/ComfyUI_LTX2_SM.git
</code></pre><p>Then install requirements with the embedded Python (portable users):</p><pre><code>cd ComfyUI_LTX2_SM
..\..\..\python_embeded\python.exe -m pip install -r requirements.txt
</code></pre><p>Or with your venv Python if you're not on portable. Restart ComfyUI fully after install.</p><p>Make sure ComfyUI itself is updated to the latest stable — older builds won't have the Gemma / GGUF text encoder plumbing this pack relies on.</p><p>Repo: <a target="_blank" rel="ugc" href="https://github.com/smthemex/ComfyUI_LTX2_SM">https://github.com/smthemex/ComfyUI_LTX2_SM</a></p><hr /><h2 id="2.-models">2. Models</h2><p>All four core files come from <strong>smthem/LTX-2.3-test-gguf</strong>: <a target="_blank" rel="ugc" href="https://huggingface.co/smthem/LTX-2.3-test-gguf/tree/main">https://huggingface.co/smthem/LTX-2.3-test-gguf/tree/main</a></p><p>⚠️ <strong>Important</strong>: Do NOT use a generic Gemma 3 GGUF from Google, Bartowski, Unsloth, etc. The smthemex loader expects HuggingFace-style tensor names. Standard llama.cpp-format GGUFs will throw an <code>UnboundLocalError: embed_tokens_key</code> on load. Only use the Gemma GGUF from the smthem repo above.</p><h3 id="transformer-(sulphur-distil)">Transformer (Sulphur Distil)</h3><p><strong>File:</strong> <code>sulphur_distil-Q6_K.gguf</code> (18.1 GB) <strong>Folder:</strong> <code>ComfyUI/models/gguf/</code></p><p>Goes in <code>gguf/</code>, <strong>not</strong> <code>unet/</code> or <code>diffusion_models/</code>.</p><p></p><h3 id="optional-lora-(for-vanilla-ltx-2.3)">OPTIONAL LoRA (FOR VANILLA LTX-2.3)</h3><p>do not use the lora with the model. the lora is for the regular vanilla LTX-2.3 model in case you have too low of vram to run this NSFW model by itself. the lora works, just not as well as the full model does. DO NOT USE THE LORA WITH THE MODEL! lol</p><p><a target="_blank" rel="ugc" href="https://huggingface.co/Seregil13th/Sulphur-2-base/blob/main/sulphur_lora_rank_768.safetensors">https://huggingface.co/Seregil13th/Sulphur-2-base/blob/main/sulphur_lora_rank_768.safetensors</a></p><h3 id="text-encoder-(gemma-3)">Text Encoder (Gemma 3)</h3><p><strong>File:</strong> <code>gemma-3-12b-it-qat-Q4_0.gguf</code> (8.7 GB) <strong>Folder:</strong> <code>ComfyUI/models/gguf/</code></p><h3 id="connector">Connector</h3><p><strong>File:</strong> <code>connector.safetensors</code> (6.34 GB) <strong>Folder:</strong> <code>ComfyUI/models/checkpoints/</code></p><p></p><h1 id="film_net_fp16.safetensors-goes-in-&quot;frame_interpolation&quot;-folder"><span style="color:rgb(250, 82, 82)"><strong>film_net_fp16.safetensors goes in "frame_interpolation" folder</strong></span><br /></h1><h3 id="video-+-audio-vaes">Video + Audio VAEs</h3><p>Two options — either source works:</p><p><strong>Option A — from the smthem repo (same page as everything else):</strong></p><ul><li><p><code>ltx-2.3-22b-distilled_video_vae.safetensors</code> (1.45 GB) → <code>ComfyUI/models/vae/</code></p></li><li><p><code>ltx-2.3-22b-distilled_audio_vae.safetensors</code> (365 MB) → <code>ComfyUI/models/vae/</code></p></li></ul><p><strong>Option B — from Kijai's LTX2.3_comfy repo:</strong> <a target="_blank" rel="ugc" href="https://huggingface.co/Kijai/LTX2.3_comfy/tree/main/vae">https://huggingface.co/Kijai/LTX2.3_comfy/tree/main/vae</a></p><p>Grab the matching video and audio VAE files from the <code>vae/</code> subfolder and drop them in <code>ComfyUI/models/vae/</code>.</p><hr /><h2 id="3.-final-folder-structure">3. Final Folder Structure</h2><pre><code>ComfyUI/
└── models/
    ├── gguf/
    │   ├── sulphur_distil-Q6_K.gguf
    │   └── gemma-3-12b-it-qat-Q4_0.gguf
    ├── checkpoints/
    │   └── connector.safetensors
    └── vae/
        ├── ltx-2.3-22b-distilled_video_vae.safetensors
        └── ltx-2.3-22b-distilled_audio_vae.safetensors
</code></pre><hr /><h2 id="4.-hardware-notes">4. Hardware Notes</h2><p>The smthemex repo lists <strong>6 GB VRAM + 48 GB RAM (peak)</strong> as the spec, leaning on the streaming offload code. If you have less system RAM, enable a generous Windows pagefile or you'll hit OOM on the transformer load step. The Q6_K transformer alone is ~18 GB before the encoder and connector come in — there is no shortcut around the RAM requirement.<br /><br /><strong>I HIGHLY RECOMMEND UPDATING YOUR BAT FILE WITH THESE FLAGS:</strong><br /><span style="background-color:rgb(26, 27, 30);color:rgb(134, 142, 150);font-family:-apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;;font-size:16px">--lowvram --disable-xformers --use-pytorch-cross-attention --reserve-vram 2 --disable-smart-memory</span></p><p><span style="background-color:rgb(26, 27, 30);color:rgb(141, 141, 143);font-family:-apple-system, BlinkMacSystemFont, &quot;Segoe UI&quot;, Roboto, Helvetica, Arial, sans-serif, &quot;Apple Color Emoji&quot;, &quot;Segoe UI Emoji&quot;;font-size:16px">(these flags will help with the text encoder tricking the push back onto cpu and will burn your vram as priority first)</span></p><hr /><h2 id="5.-troubleshooting">5. Troubleshooting</h2><ul><li><p><code>UnboundLocalError: embed_tokens_key</code> → wrong Gemma GGUF. You need <code>gemma-3-12b-it-qat-Q4_0.gguf</code> from the smthem repo specifically. See warning above.</p></li><li><p><strong>Connector not appearing in dropdown</strong> → it goes in <code>models/checkpoints/</code>, not <code>models/clip/</code> or <code>models/text_encoders/</code>.</p></li><li><p><strong>Sulphur GGUF missing from dropdown</strong> → it goes in <code>models/gguf/</code>, not <code>models/diffusion_models/</code> or <code>models/unet/</code>.</p></li><li><p><strong>Out of memory on load</strong> → check pagefile size; this workflow benchmarks at ~48 GB peak system memory.</p></li></ul><hr /><p>If you hit issues outside this list, drop a comment with the full ComfyUI console traceback (not just the popup) and the file you put in each folder.</p>

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