Vertex colours not blending across triangle face

[AlucardJay]

Assigning colours to vertices of procedurally generated mesh. Noticed the colours seem very ‘polarized’ around the vertex and not blended evenly along the face of the triangle. Is there a setting I’m missing, like the FilterMode when creating a texture? Is the answer just to create more vertices?

This is the shader I’m using : http://wiki.unity3d.com/index.php/VertexColorUnlit

Quad colour code :

// -- Colours --

colors[0] = new Color( 1, 0, 0, 1 );
colors[1] = new Color( 1, 1, 1, 1 );
colors[2] = new Color( 0, 0, 0, 1 );
colors[3] = new Color( 0, 0, 0, 1 );

mesh.colors = colors;

// ----

example :

[Kiloblargh]

From the linked page:

Both shaders allow for overbrightening, so using (.5, .5, .5)
as vertex color values results in 100% brightness, and values above that
brighten the texture accordingly, as shown by the VertexColorUnlit shader:

Meaning, you need to adjust your original colors to be half as bright to not blow out the highlight, or modify the shader.