URP RenderFeature Blit Transparency Issue

Hey, I've been working on an outline RenderFeature, however I'm running into an opacity issue.

Pretty much my workflow is like this:

1. Render pass that generates some textures

2. Texture is used in a shadergraph material to find outlines

Step I'm stuck on --> 3. Render this material to the camera

I've tried using Blit, but the alpha doesn't seem to work when I blit, I end up with something that looks like this:

Where the black should be transparent. When I put the material on a plane instead it looks more correct but I feel that the solution is a bit jank.

Any advice?