
Mastering Midjourney: A Complete Guide to Parameters
- kylixie
- Apr 22, 2025
- 3 min read

Midjourney is a powerful tool for creating amazing images from text prompts. But to truly harness its potential, you need to understand its parameters. These parameters let you fine-tune your images, controlling everything from aspect ratio to style. This guide will cover the key parameters you need to know to get the most out of Midjourney.
Understanding Midjourney Parameters
When you enter a text prompt, Midjourney uses default settings to generate your images. Parameters are commands that allow you to override these defaults. They are added to the end of your prompt, starting with two dashes (--), followed by the parameter name or abbreviation, and then the desired value. For example, to specify a 3:4 aspect ratio, you would add --ar 3:4 to your prompt. Let's dive into the essential parameters.
Version: Choosing Your Midjourney Model
The version parameter (--version or --v) determines which Midjourney model is used to generate your images. Different models have different aesthetics and prompt understanding. As of now, you can use versions 1, 2, 3, 4, 5, 5.1, 6, and 6.1. To use version 5, you would add --v 5 to your prompt. Experimenting with different versions can be fun and reveal how Midjourney has evolved. There are also the test models (--test and --testp) and the Niji anime-trained models (--niji followed by the model number).
Aspect Ratio: Shaping Your Image
Aspect ratio (--aspect or --ar) defines the relationship between the width and height of your image. It's written as width:height. The default is 1:1 (square). To create a widescreen image, use something like --ar 16:9. Remember to use whole numbers, and be aware of the limits on how tall or wide your images can be, especially with the V6 models.
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Chaos: Adding Variety to Your Results
The chaos parameter (--chaos or --c) controls the diversity of the images in your grid. The default value is 0, and it ranges up to 100. A higher value means more diverse results. Try using --chaos 5 to add some variation to your images.
Style: Personalizing Your Image Aesthetic
Midjourney offers several style-related parameters to tailor the visual aesthetic of your images:
Stylize (--stylize or --s): Controls the strength of the default Midjourney aesthetic. The default is 100, and the range is 0 to 1000. Higher values mean more stylized results but potentially less prompt adherence.
Style Reference (--style_reference or --sref): Applies the aesthetic elements (color palette, texture, etc.) from reference images to your results. You can use image URLs or style codes. Style weight (--sw) controls the influence of the style reference. The default is 100, and the range is 0 to 1000.
Style: Use --style raw to minimize Midjourney's default aesthetic influence, which is useful for more photorealistic images. Older versions had different style codes that you may want to experiment with.
Quality, Speed, and Repeats
These parameters control how your images are created:
Quality (--quality or --q): Determines how much time and power Midjourney spends generating your images. Lower values are faster but less detailed; higher values are slower but more detailed.
Speed: Turbo, fast, and relax modes control how quickly your images are generated. Turbo and fast use your fast GPU hours, while relax does not (but may not be available on all subscription plans).
Repeat (--repeat or --r): Runs the same prompt multiple times. It can only be used in fast or turbo mode. For example, --repeat 5 will run the prompt five times.
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Other Useful Parameters
Video (--video): Creates a short time-lapse of your image generation.
Stop (--stop): Ends image generation early (values between 10 and 100), which can be useful for softer, more abstract results.
Image Weight (--iw): Controls the influence of images in your prompt (when using image prompts).
Character Reference (--cref) and Character Weight (--cw): Allows you to match a character from a reference image. CW controls how closely Midjourney adheres to the character's clothing and hairstyle.
Personalize (--personalize or --p): Applies your personalized Midjourney model to your results (after you have trained it).
No (--no): Excludes specific elements from your image (e.g., --no trees will prevent trees from appearing).
Tile (--tile): Creates repeating patterns.
Seed (--seed): Uses a specific seed number for the image generation, ensuring similar results when using the same prompt and seed.
Weird (--weird or --w): Creates strange and unexpected results.
Conclusion
Mastering Midjourney's parameters can significantly enhance your ability to create the exact images you envision. Experiment with these parameters, combine them, and see what amazing results you can achieve. Stay updated with new parameters and features to continuously improve your Midjourney skills.
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