I think it could be per challenge host. One host may want to have more than 1 entries. Another might want it only 1 entry per person... Personally I would like to have it set to no more than 2 entries per person per challenge. That way,  it would placate those who only want 1 and those who want more than 1.

But majority rules. So I'll go with whatever goes by here as rule.

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OS: Windows 11 64-bit
Poser: Poser 11.3 ...... Units: inches or meters depends on mood
Bryce: Bryce Pro 7.1.074
Image Editing: Corel Paintshop Pro
Renderer: Superfly, Firefly

9/11/2001: Never forget...

Smiles are contagious... Pass it on!

Today is the tomorrow you worried about yesterday