I am working on a simple scatter detection setup. I have a source, a scattering media, and a detector that is located behind the source. I am somehow implementing the scattering wrong, but I can’t figure out what I’m doing wrong.
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/ffa2c2b2-118c-4226-a034-57ac04086715.png)
As you can see in the first picture, I am seeing about 130,000 counts on the detector from backwards scattering. This makes sense, but as the second picture shows, when I put the source and detector inside the scattering media I can no longer get any detector counts.
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/45f7ee0b-862d-4f80-a2ca-534e7249fffc.png)
I tried to change the “Inside Of” column, but that didn’t work. I also tried playing around with the Volume Physics of the scattering media. I’ve tried Mie Scattering with different settings and Henyey-Greenstein, but it didn’t change anything. What am I doing wrong here?