Hello,
We need to get possibility to compare models from different people (mainly model from architect vs. model from structural engineer). Often models are from different softwares, so it should prepared for IFC in general. This is really highly important requirement of all companies and also from investors and we see huge benefit in it, when we will be ready to check both models and make construction without any mistakes. We imagine some ,,cloud" for example, where we place both models, each model gets its unique color (for example architect red one, structural engineer blue one) a everywhere is model in same geometry (position), we can see some chosen third color (for example black). In that situation everytime we see red or blue color in models it means difference between model in some part.. We think that ,,colision finder" which is used now in many programs is useless, because each model has it's small differences and it means big amount of collision what is useless for everybody...