Don't worry about them, they're just lurking. Usually those are the folks that like to silently peruse the gallerys and post a random comment when something catches their interest. They may not have the time/talent/resources to produce any artwork, etc. but that doesn't preclude them from enjoying it or providing input on it. ;)

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Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.