I only a agree partially. In general what payware designers want, is a refund for the costs they make. The more complex a model becomes, the costs for documentation, visits, required software etc. will rise. Also the amount of hours needed to make the model will rise.
As an example: In general a FSX model is much more complex than an FS9 model. Take for instance the textures. In FS9 more or less just a texture and an alpha layer. In FSX a spec map, a bump map and the actual texture an all which their own alpha layers. And textures are just one of the more simple things.
Nevertheless it is remains a balance between the costs made and the refund expected.
I'm currently trying to help Dutchcheeseblend to finish his Fokker D-XXI. He has been working nearly daily on this model for more...