So we need to construct a reactable, thats no problem. But my question is this: will the camera underneath the table be able to see the fiducial markers through the tracepaper? Or how does this work?

Please help me in constructing the fiducial blocks

Hi AxaliaN, I just posted in the other topic in response to this.

as long as your surface is semi-transparent, yes.. tracing paper will work as will the architect paper..