Can beautiful models be made in Roblox Studio without Blender? Yes.
I know many people who made amazing models and maps without even touching Blender, a good example would be @ChooShu_Cho. They make jaw-dropping stuff with no use of Blender mostly. I can agree that Roblox Studio has many disadvanteges compared to Blender and yes, most of the time it’s generally easier/better to make something inside Blender but if you try hard enough, you could pull off some pretty good stuff with studio.
Yes, it is more difficult to make model from the studio, in this case the person modeling from the studio is more professional and creative. But modeling in the studio requires more time. The advantage of the studio is that if you make beautiful models in the Studio, you will prove yourself as a more professional modeler because you make a model from the picture in the blender and it is not difficult, it does not require any creativity etc.
I’m a bit late to this but, it’s good for certain pieces of your map to be out of parts and not meshparts, having too many meshparts in a game can cause issues, especially with collission.
In my opinion using Studio instead of Blender is basically a waste of time, the efficiency that Blender provides can’t be matched with Studio, Blender also provides more precise editing to your models since you can edit specific vertices.
You can model with unions and negates in Blender, its called boolean modifier. And no, Blender is not complicated. So basically, if I were to make a model in blender with the same quality as a studio model I could do it way easier. It just gets harder If you are making something complex. So really, there are no advantages of studio modeling and no disadvantages for Blender modeling.
All made in studios with the idea in mind to show people you don’t need 3rd party software to make something good. The possibility of Roblox is amazing and you shouldn’t force yourself to learn something else if your comfortable with roblox. That being said. Blender increases efficiency and performance
that litterally makes no sense from the last sentense, like everything in modeling is pretty much just tracing (even making something original most of the time you’re modeling from concept art, etc) and you do prove yourself if you model on roblox you’re only a professional modeler on roblox and nothing else and tracing models can be creative too you have to try to add details/manipulate the topology to how you want it, etc