I import a CAD assembly SolidWorks and explode it(SAB format) but when do the ray tracing and make the opacity of the CAD files to lower , I set all faces of the CAD files to the mirror and after ray tracing I see that rays are reflected internally inside the CAD file. like it is a shell and not a solid!! but it is solid. how can I solve this issue?
![](https://uploads-us-west-2.insided.com/zemax-en/attachment/81d409bd-ce9e-4e59-b62b-60d2c77c7bf8.png)
Best answer by Csilla Timar-Fulep
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