Stable Diffusion · Stable Diffusions Techniques
Subject and Medium
A well-defined subject and the right artistic medium
Subject & Medium
You've practiced prompt crafting and mastered Stable Diffusion settings. Now it's time to take it further — you'll learn how to use existing images as your foundation, transforming them into something entirely new.
Get ready to unlock image-to-image generation and create consistent characters with hands-on practice!

Let's Dive Deeper
Creating the AI-generated image starts with two key elements: a well-defined subject and the right artistic medium. Let's explore how to combine these effectively!
Choose one
Which of these prompts will give the AI the clearest guidance?
Defining the Subject
The subject is the core of your prompt, and more detail leads to a better result. For example, a prompt like "a dog" is too vague. Instead, adding descriptive details like "A golden retriever with a red collar running through a grassy field" gives the AI clear guidance.

practice preview
Interactive practice
Fill in the blank
Complete the prompt by adding specific details.
The Importance of Specificity
Compare the results of these two prompts:
Basic: "A bird flying in a forest"
Detailed: "A blue jay with bright feathers, flying in a snowy forest in the early morning light"

As you could see, the second prompt helped the AI generate a more accurate and visually rich image.
practice preview
Interactive practice
True / False
Decide if this common belief is true or false.
Choosing the Right Medium
The medium you select defines the style of the image. Should it look like a digital painting, a watercolor, or a photograph?
Each medium creates a different look and feel for your image.
- Digital painting: Clean lines and vibrant colors.
- Oil painting: Bold, textured strokes.
- Watercolor: Soft, blended tones.
practice preview
Interactive practice
Fill in the blank
Choose the medium that matches the given prompt.
See? The medium affected both the image's appearance and its emotional tone. A charcoal sketch might feel raw and rough, while a watercolor painting would feel soft and calming.
This is why choosing the right medium sets the emotional tone of your image.

practice preview
Interactive practice
Fill in the blank
Complete the following prompt with the right medium.
Combining Subject & Medium
When you combine a well-defined subject with the right medium, you can transform a simple idea into a compelling image. For example, "A charcoal sketch of a kitten curled up on a wool blanket by the fire."

This prompt clearly defines the subjects (kitten, blanket, fire) and the medium (charcoal sketch), giving the AI a clear direction to follow.
Choose one
What happens when you change the medium in the prompt from "oil painting" to "watercolor"?
Well done! You've learned a lot in this, so let's recap:
- Add details to your subject.
- Mediums can change the style and tone of the image.
- Combine subjects and mediums for precise results.
Practice Makes Perfect
Now it's your turn to practice creating prompts! Combine subjects with different mediums, such as:
"An oil painting of a peaceful forest at sunrise"
"A pencil sketch of an astronaut walking on the moon"
The more you practice, the better you'll get at crafting prompts that bring your creative visions to life.
