Page Curl

I admit that this is probably not a feature that is a must have for the majority of users. The current page curl feature I find is rather restrictive in how you can modify the curl. More flexibility especially the degree of curl would be useful for the times I have a need for it. Some web sites use a dynamic curl feature for when turning pages of a catalogue say. I am not expecting to have a dynamic version but something that would enable a range of curl from just a very slight one to a really full one