So, blender doesn't do vertex alpha, annoyingly, which would be great, as it's a good way to mask out edges of meshs when you have other groovey effects going on the surface (think skyrim's wind gusts). This shader will just take blender's RGB values (i.e. luminescance) and use THAT as the alpha mask. It's otherwise a bog standard Texture * colo…

VertexAlphaPlusColor

Shader "Unlit/VertexAlphaPlusColour"
{
	Properties
	{
		_MainTex ("Texture", 2D) = "white" {}
		_Color("Color", Color) = (1,1,1,1)
	}
	SubShader
	{
		Tags { "Queue"="Transparent" "RenderType"="Opaque" }
		
		LOD 100

		Pass
		{
			Blend SrcAlpha OneMinusSrcAlpha
			ZWrite Off
			
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			// make fog work
			#pragma multi_compile_fog
			
			#include "UnityCG.cginc"

			struct appdata
			{
				float4 vertex : POSITION;
				float4 color : COLOR0;
				float2 uv : TEXCOORD0;
			};

			struct v2f
			{
				float2 uv : TEXCOORD0;
				UNITY_FOG_COORDS(1)
				float4 vertex : SV_POSITION;
				float4 color : COLOR0;
			};

			sampler2D _MainTex;
			float4 _Color;
			float4 _MainTex_ST;
			
			v2f vert (appdata v)
			{
				v2f o;
				o.vertex = mul(UNITY_MATRIX_MVP, v.vertex);
				o.uv = TRANSFORM_TEX(v.uv, _MainTex);
				o.color = v.color;
				UNITY_TRANSFER_FOG(o,o.vertex);
				return o;
			}
			
			fixed4 frag (v2f i) : SV_Target
			{
				// sample the texture
				fixed4 col = tex2D(_MainTex, i.uv) * _Color;
				col.a *= i.color;//use vertex color luminescence to adjust alpha
				
				// apply fog
				UNITY_APPLY_FOG(i.fogCoord, col);				
				return col;
			}
			ENDCG
		}
	}
}