Yeah, I agree with you, this sounds very annoying.When you say OK to a dialog in Rendition, the box goes away & you just have to wonder until something starts happening.
Cool, but annoying too, without saving would be much better!You CAN edit the textures in PS but you need to save before you see it, since you're essentially editing a layer of a smart object.
I'm not sure how you could accomplish that in Photoshop- but since you can have as many layers as you want & just turn visibility on or off for each, you can have many different versions.Cool, but annoying too, without saving would be much better!