How do you approach Depth Fade?

I have been working on this explosion effect and during my process an amazing break down from Nathan came out and there are some amazing gems inside that I wanted to try to incorporate in my effect but one this is bugging me when I try to add depth fade to my smoke MI it just renders a full square instead of the alpha. I felt as if maybe the I’m getting some over shooting but I have added a saturate and I have also tried a reg clamp as well. Can anyone briefly explain ways to add depthfade to material/shader.

Happy New Years!

I believe I’ve answered my own question, I have found that I needed to plug in the alpha into the opacity of the DepthFade node. How else can it recognize the alpha if it doesn’t know about it. Lol