How would I add transparency to an outline shader?

Questions & Answers
1

I am trying to just add a transparent/alpha effect on the Bumped Outline shader found here: Outline Silhouette Shader

My mesh is an owl and I need a transparent shader for the wings. Here is an example of what it looks like with just the Transparent/Bumped Diffuse shader:
83005-owl-alpha.jpg

And here is what it looks like with the Outline/Silhouette Bumped shader:
83006-owl-outline.jpg

As you can see, the outline shader works great, but the wings should be transparent to avoid having that white filler between the feathers. I have messed with shaders a little, but am still not all that familiar with them so I’m having trouble trying to figure this out. Any help would be appreciated. Thanks.

3

In that case, replace this line (in the first “surf” function):

o.Albedo = tex2D(_MainTex, IN.uv_MainTex).rgb * _Color;

with this:

float4 tex = tex2D(_MainTex, IN.uv_MainTex).rgba;

if (tex.a < .1f)
    clip(-1);

o.Albedo = tex * _Color;

What clip does is discard the current pixel if the texture alpha (tex.a) is lower than .1f

You can use another value instead of .1f if you want. This technique is called alpha cutout and doesn’t need blending.

2

Hi, I tested that shader and I can change the alpha using the “OutlineColor” property, is that what you’re looking for?