VELVET VICE — LTX 2.5 Loop-Safe Sprite Sheet Generator

Turn a single reference image into a loop-ready horizontal sprite sheet with LTX 2.5.

This workflow was created in response to a community request: adapt the idea of an existing Wan-based sprite-sheet workflow to LTX 2.5 while preserving the features of my established VELVET VICE SIMPLE I2V workflow.

The result is a complete Image-to-Video pipeline that generates a closed animation loop, selects an exact number of frames, processes them for a sharper pixel-art appearance, and exports them as a horizontal PNG sprite sheet.

Main Features

• LTX 2.5 Image-to-Video workflow

• Internal FIRST FRAME = LAST FRAME loop conditioning

• Loop guide applied during both LTX sampling passes

• Exact user-selectable number of sprite frames

• Loop-safe selection that excludes the duplicated final frame

• Individual Nearest-Exact resizing before stitching

• Default sprite resolution: 64 × 64 pixels

• True single-row horizontal sprite sheet

• Default output: 8 sprites at 512 × 64 pixels

• Parallel video output for checking the animation

• Integrated Quick Start and Greenscreen guide directly inside the workflow

Wan-Style Pixel Processing

The included VELVET VICE Pixel Processor provides:

• Optional reference-image color matching

• One shared palette across the complete animation

• 16, 32, 64, 128 or 256 colors

• 64-color Wan-style default

• Crisp processing without dithering

• Optional Floyd–Steinberg dithering

• Keep the original background

• Remove a standard green screen

• Remove a custom background color

• Adjustable color tolerance

• Adjustable mask-edge cleanup

• Transparent RGBA sprite-sheet output

Using one shared palette for every selected frame helps prevent the colors from changing or flickering between sprites.

Important Transparency Information

The MP4 output and Live Preview intentionally keep the green background.

The standard H.264 video output does not contain an alpha channel. Background removal is applied only to the final PNG produced by:

FINAL PIXEL-PROCESSED HORIZONTAL SPRITE SHEET

The transparent sprite sheet is saved under:

ComfyUI/output/SpriteSheets

Recommended First Test

• Input image: square 480 × 480

• Duration: 4 seconds

• Frame rate: 24 FPS

• Prompt Enhancer: OFF for stricter pixel-art prompting

• Sprite count: 8

• Sprite size: 64 × 64

• Selection: LOOP SAFE · EXCLUDE DUPLICATE END

• Color Match: REFERENCE COLOR MATCH

• Palette: 64 COLORS · WAN DEFAULT

• Dithering: NONE · CRISP PIXELS

• Background:

  • KEEP BACKGROUND for complete scenes

  • REMOVE GREEN SCREEN for isolated characters

For the cleanest transparent sprites, use a flat green background and avoid green colors on the character.

Existing SIMPLE I2V Features Preserved

• STANDARD and GGUF transformer support

• GGUF keyframe embedding hotfix

• STANDARD or GGUF Gemma text encoder selection

• Image-aware Prompt Enhancer with ON/OFF switch

• Power LoRA AV

• Automatic resolution presets

• Native two-pass LTX rendering

• Native LTX ×2 latent upscaler

• High-resolution Live Preview

• Optional RIFE 48 FPS branch

• Optional VELVET VICE watermark

• Independent turquoise SIMPLE interface

The native LTX rendering core, video output, RIFE, watermark, Prompt Enhancer and Power LoRA behavior remain unchanged.

Installation

1. Extract the complete ZIP package.

2. Close ComfyUI completely.

3. Run:

_START_HERE_INSTALL_LTX25_SPRITE_SHEET_V0.3.3.cmd

1. Start ComfyUI again.

2. Refresh the browser with Ctrl + F5.

3. Load:

01_WORKFLOW/VELVET_VICE_LTX25_SPRITE_SHEET_v0.3.3.json

1. Select the LTX 2.5 model files available in your installation.

The installer updates only:

custom_nodes/ComfyUI-Velvet-Vice-LTX25-Simple

The larger VELVET VICE LTX 2.3/2.5 node pack remains untouched.

Optional Dependencies

• ComfyUI-GGUF is required only when using GGUF models or a GGUF text encoder.

• ComfyUI-VFI with flownet.pkl is required only for the optional RIFE 48 FPS video branch.

The sprite-sheet branch does not require KJNodes, VHS, WAS Node Suite or rgthree.

Notes

This workflow can strengthen a pixel-art appearance through Nearest-Exact scaling and palette reduction, but it cannot automatically turn every complex photorealistic image into professionally hand-crafted pixel art.

For the best results, begin with a clear pixel-art source, a readable silhouette, a fixed camera, controlled in-place movement and a simple background.

Created by VELVET VICE.