Photorealism

Photorealism is the goal of making a render look like a photograph. Our eyes know the real world intimately; without thinking, we know how a surface catches light, how a shadow softens at its edge, how corners darken. A photorealistic image breaks none of those expectations.

What makes a render look real?

• Light: bounced light computed properly with global illumination, and a believable sky or HDRI.
• Materials: textures at real-world scale and sensible PBR values; no surface is perfectly smooth or perfectly matte.
• Imperfection: slight wear, bevelled edges, objects that are not lined up too neatly.
• Camera: a realistic focal length, straight verticals, correct exposure.
• Post-production: restrained colour grading and tone mapping.

Is it always the goal?

Not every project needs it. At concept stage, a clay render or a more painterly image may carry the idea better. For sales and marketing, photorealism is usually the expected standard. The line to hold is this: the image should look real, but it should not make the project look like something it is not.

For practical steps, see how to get photorealistic renders.