If you just need to resize imported models after you made them that's no problem. Bryce can do that too, so you don't have to re-import them. When I model in an outside bryce app I put as many parts of the together in one file so I can already see in my modeller if they work together. I like modelling in bryce, because it's actually pretty fast. Some shapes are not easy to make in bryce and then I use Amapi 5.15 (which is the free version). A 'proper' modeller as you call it can usually move every point of every polygon on every object, so basically that means you can tweak everything to perfection. Modelling is often a bit 'try and see'. I like to model by drawing a low-res polymesh and then smoothing it. I often smooth after I made some changes to see what it looks like and then I undo the smooth again and go on with modelling until the next smooth-test. All the modelling apps I have worked with had a renderer (one more advanced then the other). If you can render an image of your object you don't need to import in into bryce during the modelling process.

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