Prompt 101

Prompts

Prompts determine what is in the image you created.

Compared to the original Stable Diffusion prompts, Rubii optimizes prompt wording—you don’t need to include quality-related phrases like "best quality" or "masterpiece." Simply describe the image content.

1. Core Subject & Description:

   • Specify the Subject: Clearly state the main object or scene you want to depict. For example: "a girl," "a boy."

   • Add Detailed Descriptions: Enrich the subject with adjectives and details. For example: "a fluffy ginger cat with green eyes," "a sprawling futuristic city with flying vehicles and neon lights."

   • Actions & Poses: Describe the action or pose of the subject. For example: "a cat sleeping on a bookshelf," "a knight fighting a dragon."

   Composition, Lighting & Color:

   • Composition/Viewpoint: Describe the composition and viewpoint of the image. For example: "close-up portrait," "wide shot," "dynamic angle," "bird's-eye view," "low angle shot."

   • Lighting: Specify the lighting effect. For example: "cinematic lighting," "volumetric lighting," "soft light," "dramatic lighting," "golden hour lighting."

   • Color: Describe the color scheme or atmosphere. For example: "vibrant colors," "monochromatic blue," "warm color palette," "dark and moody."

   Word Order & Weighting:

   • Word Order: Generally, words placed earlier in the prompt are given greater weight and attention by the model. So, put the most important elements at the front.

   • Weight Adjustment:

     • Use the (word:weight) syntax to adjust emphasis precisely—weight > 1 increases emphasis, weight < 1 decreases it. For example, (red car:1.3).

     • Use ((word)) or (((word))) to increase emphasis (equivalent to about (word:1.1) and (word:1.21), respectively; actual values depend on implementation).

     • Use [word] to reduce emphasis (about (word:0.9)).

   Iteration & Experimentation:

   • Start Simple: Begin with basic prompts to generate a foundation image, then gradually add or modify words to fine-tune.

   • Try Multiple Times: Because of the random seed, the same prompt may yield slightly different results each time. Try generating multiple images or set a fixed seed to compare prompt effects.

   • Learn from Others: Review excellent works and their prompts from others, and study their techniques and word choices.

   To summarize the core ideas:

• What: Subject, content, action.

• How: Style, medium, composition, lighting, color.

• How good: Quality-related terms.

• What not: Negative prompts.

Remember, writing prompts is more of an art than an exact science. Practice and experimentation are key to improvement!

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Example

beautiful detailed, glowing, beautiful detailed supreme quality color intricate, contemporary, 1girl, hand up, collared shirt, pleated skirt, smile, pink lips, sleeves past wrists, closed mouth, shirt, blonde hair, sidelocks, standing, parted bangs, eyelashes, cowboy shot, long hair, solo, skirt, blue eyes, black skirt, hand on own face, school uniform, very long hair, alternate costume, long sleeves, straight-on, red necktie, necktie, looking at viewer, shirt tucked in

(RWB preset)

Expanded Prompts When you want to enrich the details of an image but aren't sure what to input, you can use expanded prompts for generation. First, enter the content you already have in the image description, then click "Expand Prompt." Choose either "long" or "short," and after a brief wait, a complete prompt will be generated for you.

Negative Prompts Rubii already includes some built-in negative prompts, so you don’t need to manually specify words like "watermark," "low quality," etc. Just describe the subjects you don’t want to appear, such as "uniform" or "sky."