Hello muchcharles,
I created a blank test project and added a cube to my scene. I then added an SSR, Translucent, Surface Translucency Volume material to that Cube. I then added a post process volume and set to unbound and made sure I had SSR enabled. I added a little color to the base color of the material, .5 I believe. I then added a Reflection Capture Cube and a skylight.
I adjusted the values for the brightness of the capture and I do see a change occurring.
