What Type of Workflow Does the new 2.1 PBR engine use?

[Raz_Specter]

Hi anyone at ED,

 

Would it be possible to let us know what workflow you are using for the PBR engine?

 

Metal / Roughness Workflow

 

or

 

Specular / Gloss Workflow

 

This would be of great help if we could know this for creating Textures in Substance Painter.

 

I would appreciate a reply as I have asked on the forums before but as of yet no one has repied, please please please let us know

 

 

If the workflow names are not familiar to you here is an explanation or each one:

 

Metal Rough Worfkow

 

Base Color

Raw color with no lighting information. Small amount of ambient occlusion can be baked in if using it for micro-surface occlusion. The color range for dark values should stay within 30-50 RGB. Never have dark values below 30 RGB. The brightest color value should not go above 240 RGB.

Roughness

Describes the microsurface of the object. White 1.0 is rough and black 0.0 is smooth. The microsurface if rough can cause the light rays to scatter and make the highlight appear dimmer and more broad. The same amount of light energy is reflected going out as coming into the surface. This map has the most artistic freedom. There is no wrong answers here. This map gives the asset the most character as it truly describes the surface e.g. scratches, fingerprints, smudges, grime etc.

 

Normal

Normal map

 

Metallic

Tells the shader if something is metal or not. Raw Metal = 1.0 white and non metal = 0.0 black. There can be transitional gray values that indicate something covering the raw metal such as dirt.

 

Specular Glossiness Workflow

 

Diffuse

Raw color with no lighting information. Small amount of ambient occlusion can be baked in if using it for micro-surface occlusion. The color range for dark values should stay within 30-50 RGB. Never have dark values below 30 RGB. The brightest color value should not go above 240 RGB.

 

Glossiness

This map is the inverse of the roughness map. White 1.0 is smooth and 0.0 black is rough. Describes the microsurface of the object. The microsurface if rough can cause the light rays to scatter and make the highlight appear dimmer and more broad. The same amount of light energy is reflected going out as coming into the surface. This map has the most artistic freedom. There is no wrong answers here. This map gives the asset the most character as it truly describes the surface e.g. scratches, fingerprints, smudges, grime etc.

 

Specular

This map contains the reflectance information for both metal and dielectrics (non metal) surfaces. This is a key difference in the metal/rough and spec/gloss workflows. The same rules apply. You need to use measured values for metals and most all dielectrics will fall with the 0.04 - 4% range. If there is dirt on the metal, the reflectance value needs to be lowered as well. However, you can add different values in the specular map for dielectric materials since you have control to author the map.

 

Normal

Normal map

 

Thanks very much

 

 

Specter