Plaguekind/ltx2.3

PlagueKind - LTX2.3 Workflow - I2V - NVFP4 | MXFP8 | Ease of use

V2 Notes

• Upscale and 2x fps have added tiled sampler to improve speed. if you don't like the output, experiment with cfg pp sampler, or add 0.715 to sigma. Current sigma are done on purpose to retain identity and quality of first pass.

V1 Notes

• Focused Mainly on Speed and ease of usability while retaining single pass quality and likeness.

• First pass is more or less optimized.

• Identity Retention is pretty good.

• First pass balanced for speed and quality.

• Upscale and 2x fps work but will be optimized later.

• I would avoid using RTX VSR with the whole chain active unless you have like 96gb ram.

• Nvfp4 models are only for Blackwell, using them will not save you speed if you don't have Blackwell, but they should still work.

• Default settings of the first pass should produce good quality and sharp. I personally like to use this for a single pass and just render straight at 1280.

• Bumped FPS to 30 because it looks way bettwen imo, quality seems clearer overall and it gets rid of that ltx base fps look.

---

Memory Chunk Note

• This saves vram and speeds up it/s especially on longer videos

• With 16gb of VRAM 3 chunks seems optimal for me

• If you get triton errors, enter the model loader subgraph and disable use triton kernels

---

Requirements

• ComfyUI-PlagueKind-Nodes

• ComfyUI-KJNodes

• Rgthree-comfy

• Nvidia_RTX_Nodes_ComfyUI

• Sage Attention (optional)

---

Model Choices

ltx-2.3-22b-dev-nvfp4.safetensors

ltx-2.3-22b-dev_transformer_only_mxfp8_block32.safetensors

Latent Upscalers

ltx-2.3-spatial-upscaler-x2-1.1.safetensors

ltx-2.3-temporal-upscaler-x2-1.0.safetensors

VAE

LTX23_audio_vae_bf16.safetensors

LTX23_video_vae_bf16.safetensors

Dual CLIP (Encoder and Projection) Choices

gemma_3_12B_it_fp4_mixed.safetensors

gemma_3_12B_it_fp8_scaled.safetensors

ltx-2.3_text_projection_fp8.safetensors

ltx-2.3_text_projection_bf16.safetensors

Distilled LoRA

ltx-2.3-22b-distilled-lora-1.1_fro90_ceil72_condsafe.safetensors

---

Optional LoRA

LTX-2.3-OmniNFT-RL-Lora_bf16.safetensors

LTX_SulphurEXP_LoRA_fro99-avgrank105.safetensors

LTX_10Eros_LoRA_fro99-avgrank77.safetensors

Optional Model converted by me

10Eros_v1_experimental_nvfp4.safetensors