LayerShader
| Line 5: | Line 5: | ||
This shader is good for making terrains where you need to tile textures but still want paths. Basically it blends between two textures using alpha from the third (Path Mask) texture. | This shader is good for making terrains where you need to tile textures but still want paths. Basically it blends between two textures using alpha from the third (Path Mask) texture. | ||
| − | This shader requires a 4-texture video card (GeForce3 and up, Radeon 8500 and up). | + | This shader requires a 4-texture video card (GeForce3 and up, Radeon 8500 and up) to be rendered in one pass. |
See also: [[TerrainFourLayer]], which blends four terrain textures, and [[TerrainTwoLayerBumped]] shader, which adds bumpmapping. | See also: [[TerrainFourLayer]], which blends four terrain textures, and [[TerrainTwoLayerBumped]] shader, which adds bumpmapping. | ||
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==ShaderLab - TerrainTwoLayer.shader== | ==ShaderLab - TerrainTwoLayer.shader== | ||
<shaderlab>Shader "MyShaders/TwoLayerTerrain" { | <shaderlab>Shader "MyShaders/TwoLayerTerrain" { | ||
| − | + | ||
| − | + | ||
| − | + | Properties | |
| − | + | { | |
| − | + | _Color ("Main Color", Color) = (1,1,1) | |
| − | + | _MainTex ("Main Texture (RGB)", 2D) = "" | |
| − | + | _PathTex ("Path Texture (RGB)", 2D) = "" | |
| − | + | _PathMask ("Path Mask (A)", 2D) = "" | |
| − | + | } | |
| − | + | ||
| − | + | SubShader | |
| − | + | { | |
| − | + | Lighting On | |
| − | + | ||
| − | + | Material | |
| − | + | { | |
| − | + | Ambient [_Color] | |
| − | + | Diffuse [_Color] | |
| − | + | } | |
| − | + | ||
| − | + | Pass | |
| − | + | { | |
| − | + | SetTexture [_MainTex] | |
| − | + | ||
| − | + | SetTexture [_PathMask] | |
| − | + | { | |
| − | + | combine previous, texture | |
| − | + | } | |
| − | + | ||
| + | SetTexture [_PathTex] | ||
| + | { | ||
| + | combine texture lerp(previous) previous | ||
| + | } | ||
| + | |||
| + | SetTexture [_MainTex] | ||
| + | { | ||
| + | combine previous * primary | ||
| + | } | ||
| + | } | ||
| + | } | ||
| + | |||
| + | SubShader | ||
| + | { | ||
| + | Lighting On | ||
| + | |||
| + | Material | ||
| + | { | ||
| + | Ambient [_Color] | ||
| + | Diffuse [_Color] | ||
| + | } | ||
| + | |||
| + | Pass | ||
| + | { | ||
| + | SetTexture [_MainTex] | ||
| + | { | ||
| + | combine texture * primary | ||
| + | } | ||
| + | } | ||
| + | |||
| + | Pass | ||
| + | { | ||
| + | Blend SrcAlpha OneMinusSrcAlpha | ||
| + | |||
| + | SetTexture [_PathTex] | ||
| + | { | ||
| + | combine texture * primary | ||
| + | } | ||
| + | |||
| + | SetTexture [_PathMask] | ||
| + | { | ||
| + | combine previous, texture | ||
| + | } | ||
| + | } | ||
| + | } | ||
| + | |||
| + | Fallback "Diffuse" | ||
| + | |||
| + | |||
}</shaderlab> | }</shaderlab> | ||
Revision as of 19:38, 12 November 2009
Original Author: Bill Vinton (Sync1B)
Updated version for 2-texture cards: Jessy
Description
This shader is good for making terrains where you need to tile textures but still want paths. Basically it blends between two textures using alpha from the third (Path Mask) texture.
This shader requires a 4-texture video card (GeForce3 and up, Radeon 8500 and up) to be rendered in one pass.
See also: TerrainFourLayer, which blends four terrain textures, and TerrainTwoLayerBumped shader, which adds bumpmapping.
Usage
Terrains, Tile masking
Path Mask texture's alpha channel is used to blend between Main and Path textures.
ShaderLab - TerrainTwoLayer.shader
<shaderlab>Shader "MyShaders/TwoLayerTerrain" {
Properties
{
_Color ("Main Color", Color) = (1,1,1)
_MainTex ("Main Texture (RGB)", 2D) = ""
_PathTex ("Path Texture (RGB)", 2D) = ""
_PathMask ("Path Mask (A)", 2D) = ""
}
SubShader { Lighting On
Material { Ambient [_Color] Diffuse [_Color] }
Pass { SetTexture [_MainTex]
SetTexture [_PathMask] { combine previous, texture }
SetTexture [_PathTex] { combine texture lerp(previous) previous }
SetTexture [_MainTex] { combine previous * primary } } }
SubShader { Lighting On
Material { Ambient [_Color] Diffuse [_Color] }
Pass { SetTexture [_MainTex] { combine texture * primary } }
Pass { Blend SrcAlpha OneMinusSrcAlpha
SetTexture [_PathTex] { combine texture * primary }
SetTexture [_PathMask] { combine previous, texture } } }
Fallback "Diffuse"
}</shaderlab>
