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Done! Its the one from tomzigza

Thanks so much. Thats exactly what I needed to know.

As an example I was able to edit the shader after using your grayscale as a starting point to do this like so:

fixed4 frag(v2f IN ) : SV_Target
{
fixed4 c = SampleSpriteTexture (IN.texcoord) * IN.color;
float oldA = c.a;
c = (Luminance(c.rgba)).xxxx;
c.a = oldA;
c.rgb *= c.a;
return c ...

I just purchased this tool and it looks very promising.
I wanted to try it out with a UGUI sprite as per the documentation saying it has sprite support.
I created a default sprite template and I am able to effect change on my UGUI Image component. However I am confused on a point. How do I perform ...