pirklbauer31 wrote:That's why I asked if it was possible to combine using real dice with RPTools
Your question is really pretty non-specific leading people to jump to conclusions and conjecture. But, in short: No. No VTT does what you're asking. If they could they'd be waving their arms and crowing about it. More specifically, no VTT will just accept random/mysterious/non-specific outside input for its dice rolls. That would be a pretty basic security design flaw. Which is not to say that it couldn't... it would just need input from a "trusted" and supported source.
So before you can expect a Maptool developer to take this too seriously, you need to have a proven input method/source. That is, take the video recognition method I mentioned above: If you can develop the software/hardware combo image recognition then you might have something a MT developer could look into supporting. Jamz has shown an inkling of interest (given his "you build the dice" comment)... so you could talk to him about what platform and data you'd need to produce that MT could, potentially, use.
Oh, and the d4 issue isn't an issue. If you look down a d4 it's pretty easy to see the output. Not to mention that, to be practical, the image recognition would have to work with a moderate degree of angle (determined by the scale of the rolling "tray"). And that's if you wanted to use a more top-down method. You could also consider going with a camera beneath the rolling tray looking up through a glass bottom. That would probably be the path of least resistance.
You're really in the wrong place to pursue this as deeply as necessary, though. Once you have a developer that thinks they could provide the input path you'd need... you really need to be going down the image-recognition rabbit hole.