Native WorldViz support for character animation

[luakt]

Sorry, my questions may be very navie as I am too new to this field.

There are more than 50 3D file formats and a few tens of 3D character animation software. I do not understand why WorldViz cannot just support some of the most popular ones.

WorldViz accepts only CAL3D format for character animation. I have sourced the market of 3D character animation software but cannot find any one supporting CAL3D export natively. In such way, we will have to select a 3D character software and at the same time, look for a CAL3D export. This make our job doubly difficult.

I therefore believe that WorldViz must have a very good reason for restricting character animation to CAL3D. Can some body explain this to me?