The main problem is speed.  C4D's renderer is considered very fast.  Maya, XSI, 3DSMax are at about the same speed.  External renderers are superb.  Vue's renderer is molasses - but it does support such cool features as Ecosystems (very nice).  Poser's implementation is aggregiously slow compared to most other 3D apps - sorry.  Firefly might be a great render engine, but Poser's implementation calls for coffee, a second hobby, some free reading time, gardening.

The problem is that for the results that you get in other apps in minutes or hours, Poser consistently takes hours or days or weeks or months.  Note that there are no 30 minute high-quality animations from Poser.  Oh, you can get basic crappy animation renders in that range (~54000 frames - 30 minutes * 60 seconds * 30 fps) in a week or so.  For a quality animation render like that in Poser, expect to be rendering for some months!  Poser Pro (v7) does seem to
offer a means to do this in days - which is good!  Can't complain about that.

Again, I believe, you get what you pay for.  You spend $5K on a top-notch app, you get high quality rendering engines.  You spend $300, you get a good render engine that takes a long time.  You can't expect Maserati performance from a Toyota Celica!

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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