Documentation→Reference→Ingredients→Surface/Specular
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The specular ingredient reflects lights and Reflection Probes, and mixes it with proper fresnel handling. Its type can be changed between The Greatest Sandwich, Unity Standard, Standard, Circular, and Wave by using the side arrows next to the preview image. The specular ingredient can have custom lighting enabled by toggling the two buttons on the top right - the light bulb enables custom direct light, and the indirect lighting box enables custom indirect light. Custom lighting can either be completely overridden, or altered using layers with the type Adjustment. |
The Greatest Sandwich ...shader model Has a more realistic and energy conserving fresnel, more accurate roughness occlusion, has a lower base metallic reflectance, and is faster. Micro Occlusion - Whether the surface should self occlude/darken at higher roughnesses. |
Unity Standard Unity's standard brdf. |
Standard A very simple lighting model with a sharper fall-off. |
Circular Honestly I have no idea/can't remember...just looks kinda weird. |
Wave A pretty cool looking wave like highlight that could be used for electricity or caustics for example. |
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