# Optical illusion
**What is optical illusion?**
Optical illusion is an illusion caused by the visual system and characterized by a visual percept that arguably appears to differ from reality.
**How does it work?**
Here is a demonstration on how to generate an image that makes a landscape look like a woman.
1. Go to the shortcut page and click on "Optical illusion."
2. Select a reference image.
3. Write down the prompt for the illusion. We will use a simple prompt such as "river, sky, forest."
4. You can click on the control layer to adjust the conditioning scale. The higher the value, the more the resulting image will follow the reference image, but it will be less creative.
After everything is set, click the button to start generating. Wow, the result is amazing. Can you see the woman in the landscape picture?
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