Truncated cone effect

Hello everyone. I'm not an expert in Corel, so I need your help.

I like to make papermodels and I'm trying to create an effect in Corel for a piece I want to make.

As shown in the photo, I made this piece (01) and (02). Piece 02 would have to be made in several parts to give the effect of piece 03.
Piece 01 would be a single cut-out piece where applying the correct effect would give an illusion of depth to the piece.
So could you help me by explaining how to do this effect, I tried to do it with the Fountain Fill(F11) command. But I don't think it's the right way.

Any suggestions?

Thank you.