zorg2044
commented
1 month ago Shader notes
Resurfaced/Standard
- Alpha map of main tex will be used for smoothness.
- Metal map should not have an alpha channel as its not used and would double the file size. Its monochrome really but since BC3 compression doesnt support real mono, its basically an RGB map with metalness derived from the R channel. G and B are unused.
- Only the _MetalMap needs to be defined, using material replacement means the PBR material inherits the base KSP shader's textures
- _MetalAlbedoMultiplier is set to 1.5, the other floats don't need to be adjusted (as of Resurfaced 1.1)
Example:
SHABBY_MATERIAL_DEF
{
name = bluedog_Atlas_LR101_PBR
shader = Resurfaced/Standard
TEXTURE
{
_MetalMap = Bluedog_DB/Parts/Atlas/bluedog_Atlas_LR101_METAL
}
FLOAT
{
_MetalAlbedoMultiplier = 1.5
}
}Resurfaced/PackedMetal
This shader allows each of the RGB channels of the metal map to be used as an individual map. Thus different metal maps can be packed to account for different variants or even across different texture sets if they're the same size. Two or more channels can also be multiplied together to create combinations of those channels. The channels to be used are selected using the RGB multiplier properties
SHABBY_MATERIAL_DEF
{
name = bluedog_Atlas_A_PBR
shader = Resurfaced/PackedMetal
TEXTURE
{
_MetalMap = Bluedog_DB/Parts/Atlas/bluedog_Atlas_METAL1
}
FLOAT
{
_MetalAlbedoMultiplier = 1.5
_MetalRedMult = 1
_MetalGreenMult = 0
_MetalBlueMult = 0
}
}B9PS can be used to switch the the material properties in order to switch channels in a MATERIAL node
MATERIAL
{
transform = CCBU_tank
transform = CCBU_tankShort
transform = CCBU_tankGeneric
transform = CCBU_tankLong
FLOAT
{
shaderProperty = _MetalRedMult
value = 0
}
FLOAT
{
shaderProperty = _MetalGreenMult
value = 1
}
FLOAT
{
shaderProperty = _MetalBlueMult
value = 0
}
}Other notes
Ambient Occlusion in smoothness map
It seems best to greatly reduce the strength of AO in the smoothness map or remove it entirely.
Shader properties
Its suggested to keep smoothness at 1 in most cases and adjust values and contrast on the alpha channel for maximum control over smoothness. Smoothness and Metalness default to 1, so don't require overriding in the material def.
MetalAlbedoMultiplier should always be 1.5 Metalness should always be 1
Metal map size
Where metal maps dont have a lot of detail, and are basically masking out entire UV islands it may be worth experimenting with metal maps at half resolution
Solar Panels:
Style is WIP... current suggestion:
Metal map : solar cells 75%, black backing layer 0% Smoothness map: solar cells 100%, black backing layer 50%
Smoothness of paint
Have obtained good results so far with paint smoothness being a fair bit brighter than we've used in existing specular maps. Around 50% grey or a bit darker and higher contrast in the noise maps in those parts seem to give a nice semi gloss look with some variation in smoothness seen in specular highlights.
Glass
Glass is done at 0% metalicity. However 60% metal should be used to represent the coatings on camera lenses on science instruments etc.
Edgewear
I've gotten the best results for edgewear using the following steps:
- Leave edgewear as is in the main tex. Possibly increase opacity a little.
- Leave the edgewear out of the metal map. (Edgewear on painted parts can be considered a stylistic highlight rather than underlying metal poking through)
- Mask off the edgewear on the smoothness map for non metals. The metal map itself can be used as a mask. This way metallic parts get shinier edges but painted parts don't (it looks bad when the edges are shinier on paint)
JacobB094
Rodg88
Probe Expansion