FastWan LORA: Step-by-Step Guide for Faster Video Generation

What is FastWan LORA?

FastWan LORA is a special video generation model add-on that works with Fusion X, Vace Pose Control, and Character LORA to speed up the video generation process by almost 50%.

With this setup, you can reduce the number of steps required to create a stable and detailed video. Normally, generating high-quality videos would take around 8 steps, but with FastWan LORA, you can achieve comparable or even better results in just 3–4 steps.

Why FastWan LORA Matters

• Save time while generating multiple videos.
• Maintain stability in both characters and environments.
• Optimize workflow performance.
• Experiment with different resolutions and settings without long wait times.

Overview Table of Key Settings

Key Features of FastWan LORA

• 50% Faster Generation: Generate videos in 3–4 steps instead of the usual 8.
• Stable Character Output: Keeps character movements consistent, especially when using a character-specific LORA.
• Compatible with Fusion X: Works seamlessly with merged models like Fusion X to improve overall quality.
• Flexible Settings: Adjust step count and LORA percentages based on your desired balance between speed and quality.
• Environment Stabilization: Produces clearer background details, such as bricks, ground textures, and walls.

How to Use FastWan LORA – Step-by-Step Guide

Step 1: Prepare Your Workflow

• Start with your regular Comfy UI workflow.
• Ensure you already have Fusion X, VACE Pose Control, and Character LORA set up.
• Add FastWan LORA as an extra element to the workflow.

Note: You can download FastWan LORA from the link provided in its official GitHub repository.

Step 2: Configure the LORA Settings

• Set Character LORA strength to 1.0 (100%) for a stable, consistent character.
• Set FastWan LORA strength to 1.0 (100%) to achieve the speed boost.
• If experimenting, you can lower the FastWan LORA percentage, but keep it close to 1.0 for best results.

Step 3: Adjust the Step Count

• With FastWan LORA, you only need 3–4 steps to generate stable videos.
• Without FastWan LORA, you would need 8 steps or more.
• Avoid going below 3 steps, as 2 steps result in unstable and hazy outputs.

Step 4: Choose the Right Resolution

• Recommended width: 640 pixels.
• Going too high may introduce artifacts and degrade quality.

Step 5: Run Your Generation

• Start generating your video and observe the stability:
• At 3 steps, you’ll already see good stabilization.
• At 4 steps, the output becomes very stable and detailed.
• At 8 steps, quality improves slightly, but generation time doubles.

Step 6: Compare and Optimize

• After generation, compare different step counts and LORA percentages:
• Ground textures like sand, rocks, and bricks are good indicators of stability.
• Look at character consistency, such as clothes, belts, and accessories.

Detailed Testing Results

Two-Step Generation

• Output was too unstable.
• Background and character both lacked clarity.

Conclusion: Two steps are not enough for FastWan LORA to stabilize the video.

Three-Step Generation

• Significant improvement over two steps.
• Background elements started forming clearly.
• Characters were mostly stable.

Conclusion: Three steps provide good quality at high speed, making it an excellent balance for most projects.

Four-Step Generation

• The best balance of speed and quality.
• Both character and environment are stable and well-defined.
• Only slightly slower than three steps but worth it for the added detail.

Eight-Step Generation (Without FastWan LORA)

• Previously, I relied on eight steps for stability without FastWan LORA.
• While the quality is great, generation time is much longer.

Twelve-Step Generation

• Quality improves slightly, especially in the background.
• Not worth the extra time unless you need very detailed environments.

Comparing FastWan LORA vs. No FastWan LORA

Best Practices for FastWan LORA

• Always keep FastWan LORA at 100% to maintain speed and stability.
• Three or four steps are ideal for most projects.
• Avoid extremely high resolutions to prevent distortion or artifacts.
• Test different characters and settings, as results can vary depending on your model and environment.

FAQs

Q1. What is the main benefit of FastWan LORA?

The main benefit is speed. It allows you to generate stable videos in half the time by reducing step count from 8 to as low as 3 or 4.

Q2. Can I use FastWan LORA without Fusion X?

Yes, but results may be slightly worse. Fusion X helps enhance the quality by combining multiple LORAs.

Q3. What resolution should I use?

A width of 640 pixels works best for stability. Higher resolutions can cause artifacts and unstable outputs.

Q4. Do I need a Character LORA?

It’s optional but highly recommended. A Character LORA ensures consistency in your generated character.

Q5. Is there a point to using more than 4 steps?

For most cases, no. Four steps provide excellent quality, and increasing to eight or twelve steps only slightly improves results while doubling or tripling the generation time.

My Final Thoughts

FastWan LORA has completely transformed how I approach video generation. Before, I had to rely on 8 steps just to get a stable result, but now I can generate videos in 3–4 steps without compromising quality.

The key to success lies in:

• Properly configuring LORA percentages (1.0 for both FastWan and Character LORA).
• Using the correct step count (three or four).
• Avoiding very high resolutions to keep the output clean and stable.

This workflow has saved me countless hours while producing high-quality results, and I highly recommend experimenting with it for your projects.