• Photo manipulations:I guess time to make a stand on this.They can be interesting,and they are photographs,until they are distorted.Then we need a section for Manips.
• Photographs that have been heavily changed:If you have a digital camera and you change the tone to greyscale or any other hue,this is a drastic change. Hard to make a stance on that one.
• Images containing 2D elements: Inside the image... this might as well be Mixed Medium.
  For sure.
  But the framing of images?I know I like to add a border to give the presentation some flare for a finished gallery product. But this would be no different than matting and framing a print.
  I say allow framing in a paint program. It also keeps our skills up to date in those applications.
• Stock photography:Not allowed.
• 3D elements:Post these in the appropriate galleries.Bryce,Terragen etc.
  Trying to learn photography,it will not help me by viewing a collection of doctored up images.It will however help me seeing what happens with real out of camera scenes,to help decide on future settings for my camera.

I believe some people get used to a certain Gallery. They find friendships in them and perhaps feel out of place posting in a different section. Then I guess we might as well make this Renderosity the Free for All.If the guidelines are set strict,I will post any works that I have used a paint program on ie: watercolour in PS in the Mixed Medium.
This is all I do to an image if I decide I don't like the original output.Sometimes it is salvaged by adding the touch up.
Rarely do I ever do anything to an image except to resize for under 500mb.That and the odd crop.
I saw one photo the other day which had a body copy and pasted into it,but felt that as long as it is 2 photos taken by the photographer it should be alright.
I think though if we make a set of rules then we abide.
Maybe it's time to get more into original shots only please.
That is one reason I stopped posting in the Bryce gallery because of so many mixed mediums,who knew what was Bryce in the actual image.The contests were becoming all application...go for it all.

As far as red eye and smudging.I don't know.Guess my opinion is to allow it.

"The happiness of a man in this life does not consist in the absence but in the mastery of his passions."