minor update - light ui tweak

enginecustom/sunlight.ps

@@ -8,6 +8,7 @@ cbuffer SunLightBuffer
     float4 ambientColor;
     float4 diffuseColor;
     float3 lightDirection;
+    float intensity;
 };
 
 cbuffer SunLightColorBuffer
@@ -24,6 +25,7 @@ struct PixelInputType
     float2 tex : TEXCOORD0;
     float3 normal : NORMAL;
     float3 lightDir : TEXCOORD1;
+    float intensity : TEXCOORD2;
 };
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -42,7 +44,7 @@ float4 SunLightPixelShader(PixelInputType input) : SV_TARGET
     textureColor = shaderTexture.Sample(SampleType, input.tex);
 
     // Calculate the different amounts of light on this pixel based on the direction of the light.
-    lightIntensity = saturate(dot(input.normal, input.lightDir));
+    lightIntensity = saturate(dot(input.normal, input.lightDir)) * input.intensity;
 
     // Determine the diffuse color amount of the light.
     colorArray = diffuseColor * lightIntensity;