my Additive Shader doesn't work with Alpha...

Questions & Answers
1

Hi~ all

I am beginner… I am not good at English…

I made simple Additive shader for Particle…

I want to change texture brightness with ‘range’ in material Inspector

so… i made this shader…

but… the problem is … transparent part of texture(alpha channel) is appear …

what is wrong in my shader??

help me…please…

Shader "Mobile/Particles/simple_add1" {
	Properties {
		_MainTex ("main Texture", 2D) = "white" {}
		_Bright ("brightness", Range(0.1,2)) = 1
	}
	
	Subshader {
		Tags {"RenderType" = "Transparent" "Queue" = "Transparent"}
		blend SrcAlpha One
		
		CGPROGRAM
		#pragma surface surf Lambert alpha
		
		struct Input {
			float2 uv_MainTex;
		};
		
		sampler2D _MainTex;
		half _Bright;
		
		void surf (Input IN, inout SurfaceOutput o) {
			half4 c = tex2D(_MainTex, IN.uv_MainTex) * _Bright;
			
			o.Emission = c.rgb;
			o.Alpha = c.a;
		}
		ENDCG
	}
	Fallback "Mobile/Particles/Additive"
}

yellow part of image is… Alpha channel

48736-add-shader-1.png

2

I know this is late, but I think this is because of your blending operation on line 9. It should be :

Blend One One