i need to render "solid/volumetric/cuthrough" object...

I need to render a cut through object as being solid.
So when i move the camera into an object - i need it to be “semi-solid” - like volumetric fog would do.

There are other geometry sticking in and out to and through this geometry.

I have tried setting up procedural slice - without useable result
I have tried volumetric fog - adding volume material to object - but i dont think it can work? since it is only
I have tried with any setup with depth, camera depth etc. in the material - but when i cut through the object i will always see the inner objects.

Does anyone have any idea?

Best regards