Standard-lit particle shader for Unity3D

LitParticle.shader

Shader "Custom/Lit Particle" {
	Properties {
		_TintColor ("Tint Color", Color) = (1,1,1,1)
		_MainTex ("Particle Texture", 2D) = "white" {}
	}
	SubShader {
		Tags { "RenderType"="Transparent" "Queue"="Transparent" }
		LOD 200
		
		CGPROGRAM
		#pragma surface surf Standard alpha
		#pragma target 3.0

		sampler2D _MainTex;

		struct Input {
			float2 uv_MainTex;
			fixed4 color : COLOR;
		};

		fixed4 _TintColor;

		void surf (Input IN, inout SurfaceOutputStandard o) {
			fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * (IN.color * _TintColor);
			o.Albedo = c.rgb;
			o.Alpha = c.a;
		}
		ENDCG
	}
	FallBack "Diffuse"
}

I would suggest changing the keyword "alpha" to "alpha:fade" in order to change the shader to fade-mode alpha. Otherwise even the fully transparent parts of the surface will sometimes be lit by reflections or similar, since the default alpha mode treats transparency as a transparent material (e.g. glass) rather than as nothingness.

Worked like a charm for me after I made that change locally.