PBR materials differ from traditional materials primarily by using physics-based models to simulate light-material interactions, whereas traditional materials rely on simplified, artist-defined parameters.
Key differences include PBR’s focus on replicating real-world light behavior through physically accurate properties like albedo, roughness, and metallic. This ensures consistent realism across varying lighting conditions—unlike traditional materials, which often use arbitrary adjustments that may appear unrealistic under different lights.
For realistic 3D renders, PBR materials reduce manual tweaking and improve consistency compared to traditional materials.