As a Roblox developer, it is hard to create a thumbnail of an item/model without either exporting something to an external application and then uploading it as a decal or using “ThumbnailCamera” and exporting it as a model and then using a web API to curl the thumbnail from the model. I feel like a way that allows us to skip uploading it as a model and instead creates a decal, would be a great alternative and gives us that little extra ease of access compared to a model.
If there’s a “ThumbnailCamera” inside a model there’s two options: publish selection as model and export selection as decal.