Resolution & Generation Mode

This page explains how resolution and generation mode work in the FASHN app. These are two independent controls that together determine the output quality, speed, and credit cost of your generations. If you are unsure what to choose, leave both on auto and the app will select the best settings for your input.

Image Settings

Resolution

Resolution controls the output pixel count of your generated images:

• Auto (default) — matches output resolution to your input image
• 1K (~1 megapixel)
• 2K (~4 megapixels)
• 4K (~16 megapixels)

Exact output dimensions depend on the resolution tier and the image aspect ratio. All plans have access to all tiers.

Auto compares the total pixel count of your input image to the three tiers and picks the closest match. Tools without an image input (Model Create, Create Face) default to 1K.

1K is the fastest and most affordable option. It covers more use cases than you might expect: social media platforms like Instagram, TikTok, and Pinterest display images at around 1,080px wide, and most e-commerce platforms serve product listing images at 300-800px. If your output is headed for social media or product grids, 1K is all you need.

2K is the sweet spot for e-commerce product detail pages. Major platforms like Shopify, Amazon, and Zalando recommend uploading images of at least 2,000px on the longest side to support product zoom, and 2K lands right in that range. Use 2K when customers need to inspect product textures, stitching, or fabric detail through a zoom or magnifier feature.

4K produces the highest detail output. Most web and social channels will never display this resolution, so 4K is best reserved for print catalogs (A4 at 300 DPI needs roughly 9 megapixels), large-format signage, or when you need a single high-resolution master to crop into multiple aspect ratios and deliverables.

Generation Mode

Generation mode sets the quality level for image generation:

• Auto (default) — selects the optimal mode for your input
• Fast — fastest generation, most affordable
• Balanced — middle ground between speed and quality
• Quality — most capable model, most realistic results (Pro and Agency plans only)

Auto chooses between Fast and Balanced based on factors like the requested resolution and the tool, leaning toward Balanced when the context benefits (higher resolutions or multi-image tools like Try-On) and Fast otherwise. Quality is opt-in only and must be selected manually when you want the highest fidelity (Pro and Agency plans only).

Fast is the quickest option and produces consistent, predictable output. It follows instructions precisely and is the most reliable choice for localized edits (adjusting hand position, tilting the head, small fixes) without altering the rest of the image.

Balanced delivers sharper detail and richer textures while remaining responsive. It handles multi-image inputs (Try-On, Edit with Image Context) better than Fast and follows detailed instructions more reliably. A good default for most production workflows.

Quality produces the most photorealistic output with the highest level of detail. It excels at maintaining subject consistency when working with multiple images (Try-On, Edit with Image Context) and interprets nuanced prompts with the highest fidelity. Takes longer to generate but delivers the best results for final, publication-ready assets.

Image credit costs

Credit costs depend on the combination of resolution and generation mode. If you request multiple outputs in a single run, the cost is multiplied by the number of outputs.

These costs apply to Product-to-Model, Model Swap, Model Creation, Face Creation, Image Edit, Reframe, and Try-On:

Example: Model Swap at 2K Quality, requesting 2 images: 2 x 2 = 4 credits.

Video Settings

Video resolution works differently from image resolution. Instead of 1K/2K/4K tiers, video uses standard video formats:

• 480p
• 720p
• 1080p

Each resolution corresponds to a different AI video model optimized for that fidelity level. Higher video resolution also implies better quality: more realistic motion, better prompt adherence, and more consistent subjects across frames.

Video credit costs

Plan-based video resolution access

• Basic plan: up to 720p
• Pro and Agency plans: up to 1080p

1080p also unlocks the optional End Image input on Image to Video, which anchors the final frame of the generated video. See End Image for details.