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This is the Car Tyre shader for use on rubber parts of tyre only.

This page gives technical definitions.

L2IBLCARTYRE

Please note UV_A, UV_B, UV_C or UV_D refers to as specified in the gTexture slot in 3ds Max. There is a full explanation of this here.

Enable or Disable the blending to a second set of albedo maps based on the wear of the tyre.

Allows the adjustment of Albedo and Roughness based on the Albedo Wear.

Dampen the specular effect at the base of the tyre where it meets the ground.

Dampen the specular effect on the tread of the tyre. This should be enabled for close cockpit cars.

Allows an extra AO map which is always applied, and uses a unique set of UVW. This can be used to bake details which are unique of damage.

Allows the manual setting of tyre progress to allow artists to fine tune the maps. Do not save the material with this enabled.

This section allows the adjustment of final output of the material.

AlbedoTint
ReflectionAt0Angle
Specular: 1.0 is recommend default for most materials. For natural materials this may need reducing to around 0.5 depending on the nature of your specular maps.
Metallic: Adjust overall Roughness, lower than 0.5 makes surfaces less metallic. Above 0.5 makes surfaces more metallic.
Roughness: Adjust overall Roughness, lower than 0.5 makes surfaces smoother. Above 0.5 makes surfaces rougher.
NormalIntensity: Adjust the overall strength of normal maps in the entire material.
NormalShadowInflunce: Adjust the amount of influnce the normal map has on shadows cast onto this surface.

Adjust the effect this has on the material:

AlbedoMultiply: The albedo is multiplied by the specified value. The higher the value the less the effect.
RoughnessAdjust: The roughness is offset by the specified value. Above 0 it will become more rough, beneath 0 it will become more smooth.

DamageBlend: Over-ride the amount of damage shown on the tyre.
WearAlbedoDarkening: Over-ride the amount of wear darkening that is being applied.

Name	UV	Type	Default File Types	Description
albedoRoughMap	UV_A	SRGB (Alpha linear)	albr	Clean, default Albedo map, with roughness map in alpha channel. This is blended on a per vertex basis based on tyre wear with the Damage Albedo Map Note the recommended SRGB albedo for rubber is a luminosity of 53. See PBR - Maps & Authoring
damageAlbedoRoughMap	UV_B	SRGB (Alpha linear)	albr	Damage Albedo map, with roughness map in alpha channel.
aoSpecularMap	UV_A	Linear	aos	Clean default AO map. This is blended on a per vertex basis based on tyre wear with the Damage AO map. The red channel is applied as a mask to Specular output. The green channel is applied as a mask to AO.
normalMap	UV_A	Linear	nm	Clean default Normal map. This is blended on a per vertex basis based on tyre wear with the Damage Normal map.
damageAoSpecularMap	UV_B	Linear	aos	Damaged AO map. The red channel is applied as a mask to Specular output. The green channel is applied as a mask to AO.
damageNormalMap	UV_B	Linear	nm	Damaged Normal Map