Light transmission not showing in material options

[CCSseeking]

When I'm on Classic 3D, Geometry options are disabled and so I can't have "thickness"; when I'm on Cinema 4D, Geometry options appear but it disables all the light transmission options. What can I do? Mac M1.
Please see the two screenshots below. 

[Rick Gerard]

If you open the Composition Settings/3D Renderer (Ctrl/Cmnd + K) and read the warning when you change to the C4D rendering option, you will discover a lot of unsupported features. 

It's not a bug. It is a limitation.

[CCSseeking]

Hi, yes I know C4D doesn't support light transmission. My question is, if I use Classic 3D, how do I get the 3D letters like the ones on C4D, meaning having Geometry Options?
Thanks.

[Mylenium]

You can't. Those things are mutually exclusive. If you need advanced transparency trickery, you have to do things natively in a 3D program or buy plug-ins like Element 3D.

Mylenium

[CCSseeking]

So that’s why. I imagined that it might not be an option anymore. Ok at
least now I know.
Thank you!