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| Closure | Description | Ray Types |
|---|---|---|
| microfacet – ggx | Models isotropic or anisotropic GGX BRDF. This model can handle reflection, refraction or both at the same time. | reflection, refraction, glossy |
| microfacet – gtr | Models isotropic GTR BRDF. A "gamma" parameter can be supplied to control the "tail" of the highlight to model highly realistic materials. | reflection, refraction, glossy |
| microfacet – cooktorrance | Models an anisotropic Cook-Torrance BRDF. | reflection, glossy |
| microfacet – blinn | Nodels Models a Blinn specular BRDF | reflection, glossy |
| oren_nayar | Models a diffuse reflector based on the Oren-Nayar model. | diffuse |
| diffuse | Models a diffuse reflector. | |
| reflection | Models a perfect reflector. Note that fresnel factor is automatically computed by 3Delight. If no fresnel component is wanted, one can pass 0 as the "eta" parameter. | reflection |
| refraction | Models a refraction. Fresnel factor is included by 3Delight. | refraction |