Doming, Dishing, or 2 axis bending

[CrimsonForge]

If i wanted to make a hollow open bottom "rounded top pyramid" shape, how would I draw that?

(Think single knuckle guard)

[Tech2]

I'm not clear on the shape. Can you post a pix?

[Muhalo]

How about something like a garbage can lid?

I too was thinking of a dome shape for creating a fire pit lid (30 inch diameter).

[Tech2]

Please see:
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That method allows you to model the shape. However something 30" in diameter would be very expensive to machine. You might be better off doing a sheet metal approach with numerous tabs that get bent at the edge and then optionally welded but that does not give a dome shape. An actual domed weld-free can lid is "drawn" which requires expensive tooling.