Trail faded at start - All colors are full alpha

I need my trail to have a solid color at the start, but it looks like this:

As you can see, the Color array has all values set at full alpha, but the trail is still faded at the start. How can this be prevented?

Tiny picture… but it looks like your material (bottom right of pic) isn’t a solid color. Looks like it has a fairly low alpha value.