There are different ways. You can use wedges of styrofoam to achieve that look
Thank you for your response. I need more instruction. Thanks.
That cake was created by a CC member-- I recently viewed it (tonight actually) so I think it may have been a recent upload. Try PMing them and asking directly.
It doesn't say who made it.
Thank you. That link is great. What might this cake be called besides 'wedge cake' ?
No problem. I guess it would be called a topsy turvy cake.