How Rendair AI Interprets Lighting and Shadows
Rendair reads the light in your image and your description, and creates shadows and reflections that fit. Say what you want, such as low evening sun from the left, and use Change Time of Day to adjust it. It is a visual result, not a light simulation, so it looks natural but is not a measured study of sun and shade.
Last updated October 26, 2026
Light is one of the biggest parts of a good render, and you can direct it in Rendair with your input and your words.
Where the light comes from
- Your input: if your image already has light and shadow, Rendair uses them as a guide.
- Your description: write the light you want, such as "soft overcast light", "low evening sun from the left" or "bright midday sun".
Shadows and reflections
Rendair creates shadows and reflections that fit the light and the materials, such as glass, water and polished floors. The result looks natural in the image.
Change the light afterwards
Use Change time of day to move from morning to night, and Change weather to add clouds, fog or rain.
Good to know
This is a visual result. Rendair does not run a light or sun study, so use dedicated software when you need exact sun angles or shading analysis.