My top 3 3] Ditto a nested folder structure capability. 2] A realtime texture/bmpmap management with previews, on-the-fly conversions/resamplings, & the ability to associate an official template with each object, & superimpose it over a preview of any texture or bmpmap to make sure it's the right texture for the current model before loading. 1] Separate Face & expression control panels & libraries, so loading an expession doesn't mean changing to whatever character was loaded when the expression was saved.