Documentation/Tools/SCS Blender Tools/Supported shaders

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Revision as of 14:55, 5 February 2016 by 50keda (talk | contribs) (mlaaweight)

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With version 1.0 Blender Tools are presenting flavors in materials. Flavors are used for common passes in more shaders. Depending on each shader different flavors can be enabled on it.

Shader preset list now includes only base shader types, which can be later altered with switching different flavors on and off. That's why this page now resembles base shader types and flavors description.

Base Shader Types

building.add.env.day

Use this material if you want your building windows to reflect at day-time and be lit at night. It shall be more or less used on distant "panorama" buildings as they don't need advanced features from #window.day / #window.night.

It effectively switches two materials depending on the time of the day. During the day it uses #dif.spec.add.env material with texture for reflections and at night switches to #dif.lum.spec in order for windows to light at the night.

The texture must have alpha channel on places where it should have reflections and light at night.

building.day

Same as #building.add.env.day without reflection component.

It effectively switches two materials depending on the time of the day. During the day it uses #dif.spec material where alpha is used as specular map and at night switches to #dif.lum.spec in order for windows to light at the night.

building.lvcol.day

Same as #building.day with extra multiplication of vertex color.

During the day vertex color is multiplying specular map, on the other hand during the night vertex color is multiplying luminance.

decalshadow

Used for transparent static baked shadows. Color of surfaces is put together from the base texture multiplied with material diffuse and vertex color.

On the other hand transparency is donated by multiplication of vertex color alpha and base texture alpha channel.

dif

This is one of the most basic shader with diffuse and specular light featuring one texture. Specular light is used directly from value specified in material.

Useful flavor combinations

  1. "dif.a" - the areas on geometries where texture has alpha value 0 will be transparent. Example usage: grills, railings and ladders on far buildings.
  2. "dif.shadow" - uses geometry also as shadow caster. This type of shader shall be used only in the case of complex animated geometries, because cost of animation calculation may be greater than calculating shadows directly on high poly mesh.
  3. "dif.shadow.a" - is a combination of "dif.shadow" and "dif.a" which means that areas of geometry which will be transparent also won't cast shadows. This shader may be used for fences models which shall beside begin transparent also cast shadows.
  4. "dif.over" - in this case alpha map represent transparency blending of material, where alpha with value 0 means completely transparent and alpha with value 255 means non transparent.

dif.anim

Same as #dif with extra behaviour of blending over time between base and over texture.

Extra auxiliary setting in this shader defines animation speed, meaning how quickly textures are switched.

dif.lum

Same as #dif with additional linear interpolation calculation between "dif" shader result and base texture RGB colors by factor of base texture alpha channel. As a result this shader will give you lit surfaces during the night, where amount of surface lit is donated by base texture alpha channel.

Example usage of this shader are dashboard and gps surfaces in truck inside Euro Truck Simulator 2 game.

Useful flavor combinations

  1. "dif.lum.decal.over" - decal part of shader name donates ability to use lightning model from the surfaces lying behind geometries using this shader and over part of shader name represent transparency blending of material, where alpha with value 0 means completely transparent and alpha with value 255 means non transparent. Example usage of this shader are lit icons on buttons in truck cabin which shall be:
  2. lit to reflect effect of back light,
  3. transparent around icon to blend on the button below,
  4. use the lightning model from the surface below again for blending on the button surface.

dif.lum.spec

Similar as #dif.lum with difference that surface has additional specular map shading as #dif.spec.

dif.spec

Basic shader with diffuse and specular light featuring one texture. Alpha of the texture represents intensity of specular light.

Useful flavor combinations

  1. "dif.spec.a" - making transparent areas where texture has alpha with value 0.
  2. "dif.spec.over" - texture alpha channel also represent transparency blending of material, where alpha with value 0 means completely transparent and alpha with value 255 means non transparent.
  3. "dif.spec.shadow" - uses geometry also as shadow caster. This type of shader shall be used only in the case of complex animated geometries, because cost of animation calculation may be greater than calculating shadows directly on high poly mesh.
  4. "dif.spec.shadow.a" - with enabled shadow calculations over alpha channel which means that areas of geometry which will be transparent also won't cast shadows.
  5. "dif.spec.tsnmap.shadow" - with extra texture defining normal maps and using geometries for shadow casters. Both textures are using same UV layer. This type of shader shall be used only in the case of complex animated geometries, because cost of animation calculation may be greater than calculating shadows directly on high poly mesh.

dif.spec.add.env

Same as #dif.spec with additional reflection pass and texture.

Useful flavor combinations

  1. "dif.spec.add.env.paint" - with usage of extra color defined in definition files. All areas on the base texture will be multiplied with extra color while in game. This shader is either used for AI cars or truck parts which should be painted with base truck color.

dif.spec.add.env.nofresnel

Same as #dif.spec.add.env without fresnel attribute and computation, therefore is slightly cheaper to compute.

dif.spec.fade.dif.spec

Shader mostly used for rocks where one texture can be used as base and detail one.

Shader is fading between base and detail texture with assumption that detail texture is representing details of base texture (sounds like fractals). Therefore base and detail textures should use same texture file which has to be self-similar.

However blending details are defined with auxiliary values where:

  • From - detail texture fade out start, represented as z-distance in meters
  • Range - detail texture fade range, represented in meters
  • Bias - strength of detail texture mixing with base texture
  • UV Scale - UV layer scale factor for detail layer (as shader shall be using same textures for base and detail, this factor comes handy as user can use only one UV layer for base & detail and then this factor represents how UV layer will be rescaled for detail texture)

dif.spec.mult.dif.spec

Same as #dif.spec with one more texture which color and alpha is multiplied with base texture.

Example usage in Euro Truck Simulator 2 is trailer where company texture is multiplied with base texture of the trailer.

Useful flavor combinations

  1. "dif.spec.mult.dif.spec.tsnmap.shadow" - beside normal maps geometries with this material will also cast shadows. This type of shader shall be used only in the case of complex animated geometries, because cost of animation calculation may be greater than calculating shadows directly on high poly mesh.

dif.spec.mult.dif.spec.add.env

Same as #dif.spec.mult.dif.spec with additional reflection pass and texture.

dif.spec.mult.dif.spec.iamod.dif.spec

Special use shader based on #dif.spec.mult.dif.spec and is usually used for building walls.

Shader is combining two multiplied opaque textures with third inverse-vertex-alpha (iamod) texture. The third texture should represent decal/dirt/wear layer where texture alpha channel and vertex alpha controls how strong this decal application is. Vertex color alpha with value 0 will apply the most and value 0.5 won't apply third layer at all.

dif.spec.oclu

Behaves in similar way as #dif.spec.mult.dif.spec but the second texture in this case is using gray-scale image (only one channel) which results in better performance.

General usage of this shader is as recognized as using #dif.spec with "ambient occlusion" texture.

dif.spec.oclu.add.env

Same as #dif.spec.oclu with additional reflection pass and texture.

dif.spec.over.dif.opac

Same as #dif.spec with extra mask texture which color is mixed with base texture color by factor of alpha from mask texture.

dif.spec.weight

Same as #dif.spec with modified specular light.

It's mostly used for roads and asphalts, due distinct feel of specularity and diffuse properties of such surfaces.

dif.spec.weight.add.env

Same shader as #dif.spec.weight with additional reflection pass and texture.

dif.spec.weight.mult2

Special case shader created mostly for road surfaces combining base texture with "smeared top layer". Smeared layer is donated by multiplication texture and mixed by both textures alpha channels.

This shader shall be replaced with simple #dif.spec.weight instead if possible.

dif.spec.weight.mult2.weight2

Transition shader between two shaders of #dif.spec.weight.mult2 for simulating transitional areas (usually road shoulders).

Fading between first and second shader is done by vertex color alpha, where value 0 will use only first layer and value 0.5 will use only second layer, any value in-between will mix both layers respectively.

This shader shall be replaced with #dif.spec.weight.weight.dif.spec.weight instead if possible.

dif.spec.weight.weight.dif.spec.weight

Transition shader between two shaders of #dif.spec.weight, where texture for first shader is presented as base and texture for second shader as over texture.

Fading between the two is done by vertex color alpha, where value 0 will use only base texture layer and value 0.5 will use only over texture layer, any value in-between will mix both layers respectively.

Additionally this shader also supports secondary specular (color and shininess), so even shaders with different specular behaviour can be transitioned.

This shader is usually primary choice when creating roads with transition to road shoulder.

dif.weight.dif

Transition shader between two shaders of #dif where base texture presents texture for first shader and over texture presents texture for second shader.

Fading between the two is done by vertex color alpha, where value 0 will use only base texture layer and value 0.5 will use only over texture layer, any value in-between will mix both layers respectively.

fakeshadow

Geometry with this material is used to outline contour of the vehicle from which casting of shadow volume begins. Due wheels vertical motion this material is required to be present in the wheel scene as well. It must outline the contour of the whole wheel.

flare

Shader for simulating light scatter or/and retina glare.

Result of the shader is additive non-lit surface which color part consist of base texture multiplied by vertex color and diffuse material attribute, on the other hand alpha part consists of multiplication between texture alpha channel and vertex color alpha.

glass

Glass material which uses base texture alpha for specular map and it's also controled by tint parameters:

  • Tint - color for glass
  • Tint Opacity - mixing factor between transparent and opaque glass

Depending on the type of glass and it's usage user should properly choose reflection texture.

grass

Shader used in special cases for static not moving grass.

It's result is the same as #dif with transparency controlled by multiplication between vertex alpha color and base texture alpha channel.

Normals on the meshes using this shader are ignored as shader always uses normals up as lighting applied to mesh should more-or-less match the ground (assuming ground is flat).

lamp

Lamp material used for vehicle lights, auxiliary lights and traffic lights. With the second mask texture this material defines masking areas for situations when particular light is turned on.

More about lamps in Lamp system.

Useful flavor combinations

  1. "lamp.add.env" - with additional reflection pass and texture.

light.tex

Light map shader which is behaving as fake light source by adding diffuse and specular to surfaces beneath. This shader variant has light map always on independent on day/night.

Example usage would be creation of light map shining on the ground emitted from lights inside the building.

lightmap.night

It is night variant of #light.tex, meaning surface with this shader will be visible only during the night. During the day this light map will be switched off.

mlaaweight

Geometries with this shader won't be visible, instead they will switch off MLAA processing on the geometries beneath surfaces using this shader.

Example usage is to place simple plane with material of this shader above truck dashboard so that the textures presenting speed text, rpm text, etc. stays sharp.

none

reflective

shadowmap

shadowonly

sign

sky

truckpaint

unlit.tex

unlit.vcol.tex

water

window.day

window.night

Flavors

a

add.env

altuv

airbrush

awhite

add & over & mult

colormask

decal

flat

indenv

linv

lvcol

tsnmap & tsnmap16 & tsnmapuv & tsnmapuv16

nocull

paint

shadow

tg0

tg1