Is it possible to make a neon-outlined silhouette style game in Unity free?

[renegade109]

Is it possible with the free version of Unity to render 3D objects with a decently thick neon outline and a silhouette body? I’m looking for an effect similar to the 2D example below.

I know that there is a Toon Shader in the Asset Store but I only need this one feature and I’m not sure if it would be supported by the free version of Unity even if I did buy the Shader. All I want to know is whether or not Unity Free would support something like this (a “how” explanation is not necessary).

[MrVerdoux]

It is supported, but you better know how to make some shaders! There are not many available out there.

[tanoshimi]

Like this?

Create a new shader, paste this in. Then assign the Neon-OutlineSilhouette shader to the material attached to your object:

Shader "Neon-OutlineSilhouette" {
    Properties {
        _OutlineColour ("Outline Colour", Color) = (0.95,0.5,0.5,0.5)
        _OutlineWidth ("Outline Width", Float) = 0.01                                                               
    }
    CGINCLUDE
    #pragma vertex vert
    #pragma fragment frag
	#pragma fragmentoption ARB_precision_hint_fastest
    struct a2v {
       float4 vertex : POSITION;
       float3 normal : NORMAL;
    };
    struct v2f {
        float4 pos : SV_POSITION;
    };
    uniform fixed4 _OutlineColour;
    uniform half _OutlineWidth;
    ENDCG

    SubShader {
        Tags {
        	"Queue" = "Geometry+100"
        	"IgnoreProjector" = "True"
        }

        Pass {
			Name "SILHOUETTEINTERIOR"
	    	Cull Back
			Blend One Zero
            Lighting Off 
            CGPROGRAM
            v2f vert (a2v v)
            {
               	v2f o;
               	o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
               	return o;
            }
   			fixed4 frag (v2f IN) : COLOR
    		{
        		return fixed4(0.0,0.0,0.0,1.0);
   			}
            ENDCG
        }

        Pass {
            Name "OUTLINE"
            Cull Front
            Offset 10, 10
            Lighting Off
            Blend SrcAlpha OneMinusSrcAlpha
            CGPROGRAM
            #include "UnityCG.cginc"
            v2f vert (a2v v)
            {
                v2f o;               
               	o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
				float3 norm = mul((float3x3)UNITY_MATRIX_IT_MV, v.normal);
				float2 vOffset = TransformViewToProjection(norm.xy);
				o.pos.xy += vOffset * o.pos.z * _OutlineWidth;
                return o;
            }
            fixed4 frag (v2f IN) : COLOR
    		{
       			 return _OutlineColour;
    		}
            ENDCG
        }   
    }
}