How to add tessellation shader to unlit shader?

I have the following declarations in my unlit shader:

Code (CSharp):

1.             CGPROGRAM
2.             #pragma vertex vert
3.             #pragma fragment frag
4.             #pragma tessellate:tessDistance
5.             #pragma target 4.6
6.             // make fog work
7.             #pragma multi_compile_fog
8.             #include "Tessellation.cginc"
9.             #include "UnityCG.cginc"

And then i have for my tessellation shader:

Code (CSharp):

1.             float4 tessDistance (appdata v0, appdata v1, appdata v2) {
2.                 float minDist = 100.0;
3.                 float maxDist = 200.0;
4.                 return UnityDistanceBasedTess(v0.vertex, v1.vertex, v2.vertex, minDist, maxDist, _Tess);
5.             }

But it doesn't work for me. However if i use a standard shader it works fine. What am i missing in regards to my unlit shader to get it to work ? Thanks.

 

BUMP: Anyone know the solution to this?

Is it possible to use "UnityDistanceBasedTess" in a Unlit shader?

 

I don't think you can use "UnityDistanceBasedTess" in an unlit shader, just in a surface shader if it's declared as the tessellation function for unlit tessellation i always use the domain and hull shader approach.
https://catlikecoding.com/unity/tutorials/advanced-rendering/tessellation/

 

You can have a distance based tessellation in an unlit shader, but you need to build it yourself. If you look at the graphics pipeline for hlsl, you'll see the tessellation stage is controlled by a hull shader and a domain shader.


It's not as bad as it sounds, because unity does the heavy lifting for you.
If you really want to know step by step what to do, I'd recommend this tutorial by catlikecoding.

It's a little difficult to follow, because she builds on top of her older tutorials, but you can download her projects and see how everything works.

Here is a thread about a shader I made using both tessellation stage, geometry stage, and a shadow caster pass: LINK