Car shader problem

Questions & Answers
1

Hi,
I’ve written my first custom shader (Unity 4.0.0f5, DX11)

Shader "Custom/FerrariShader" {
Properties {
	_Color ("Main Color", Color) = (1,1,1,1)
	_SpecColor ("Specular Color", Color) = (0.5,0.5,0.5,1)
	_Shininess ("Shininess", Range (0.01, 1)) = 0.078125
	//_ReflectColor ("Reflection Color", Color) = (1,1,1,0.5)
	_MainTex ("Base (RGB) RefStrGloss (A)", 2D) = "white" {}
	_Cube ("Reflection Cubemap", Cube) = "" { TexGen CubeReflect }
	_BumpMap ("Normalmap", 2D) = "bump" {}
	_SpecularMap ("Spec(R) Gloss(G) Reflec(B)", 2D) = "specular" {}
	_RimPower ("Rim Power", Range(0.005,8.0)) = 1.0
}

SubShader {
	Tags
		{
"Queue"="Geometry"
"IgnoreProjector"="False"
"RenderType"="Opaque"

		}
	LOD 400
	Cull Back
ZWrite On
ZTest LEqual
ColorMask RGBA
Fog{
}
CGPROGRAM
#pragma surface surf BlinnPhong
#pragma target 5.0

sampler2D _MainTex;
sampler2D _BumpMap;
sampler2D _SpecularMap;
samplerCUBE _Cube;
float _RimPower;
fixed4 _Color;
fixed4 _ReflectColor;


half _Shininess;

struct Input {
	float2 uv_MainTex;
	float2 uv_BumpMap;
	float3 worldRefl;
	float3 viewDir;
	INTERNAL_DATA
};

void surf (Input IN, inout SurfaceOutput o) {
	fixed4 tex = tex2D(_MainTex, IN.uv_MainTex);
	fixed4 texSpec = tex2D(_SpecularMap, IN.uv_MainTex);
	fixed4 c = tex * _Color;
	float diffusePower=.3;
	float reflectPower=.7;
	o.Albedo = c.rgb*diffusePower;
	//o.Gloss = texSpec.rgb;
	o.Normal = UnpackNormal(tex2D(_BumpMap, IN.uv_BumpMap));
	//o.Specular = texSpec.r*_Shininess;
	float3 worldRefl = WorldReflectionVector (IN, o.Normal);
	fixed4 reflcol = texCUBE (_Cube, worldRefl);
	
	half rim = 1.0-saturate (dot (normalize(IN.viewDir), o.Normal));
	o.Emission = reflcol.rgb* pow(rim,_RimPower/3)*texSpec.b*reflectPower;//* pow(_ReflectColor.rgb,_RimPower);
	//o.Emission = Lerp0.rgb;

				o.Normal = normalize(o.Normal);
			}
ENDCG
}

FallBack "Diffuse"
}

I’m quite satisfied, but when car parts aren’t thrown by direction light, car seems to me too dark.

4855-tipasso1.jpg
4856-tipasso2.jpg
Please give me feedbacks and suggestions !!!
Thanks

2

You can icrease your ambient ligth (and reduce your directional light to compensate) or you can write your own light model.

3

thanks, you pointed me in the right direction:
you mean that I should make something like this:

half4 LightingFerrariPhong (SurfaceOutput s, half3 lightDir, half3 viewDir, half atten) {
          half3 h = normalize (lightDir + viewDir);

          half diff = max (0, dot (s.Normal, lightDir));

          float nh = max (0, dot (s.Normal, h));
          float spec = pow (nh, 48.0);

          half4 c;
          c.rgb = .9*s.Albedo+(.1 * _LightColor0.rgb * diff + _LightColor0.rgb * spec) * (atten * 2);
          c.a = s.Alpha;
          return c;
      }
4

yes, I already added

#pragma surface surf LightingFerrariPhong

4858-tipasso3.jpg

darkness problem is solved, I have to tune light
thanks!!!