PBR material

A PBR material (Physically Based Rendering) describes how a surface responds to light with a few parameters grounded in physics. Instead of guessing how shiny something should look, the artist enters the surface’s real properties and the render engine works out the result. The same material then looks consistent under morning sun and evening lamps alike.

The core PBR maps

• Albedo (base colour): pure surface colour, with no shading or reflections baked in.
• Roughness: microscopic surface texture, deciding how sharp or blurred reflections are.
• Metalness: whether the surface is metal or not.
• Normal: fine surface detail without changing the geometry.
• Displacement / height: height data for real surface relief.

Why it matters

PBR gives everyone a common language. Materials downloaded from texture libraries behave similarly across engines, and the logic of a material survives when a model moves from one program to another. In architectural visualization, convincing timber, concrete or polished stone depends largely on getting roughness and albedo right. For more on choosing finishes, read materials for architectural modeling and rendering.