I don’t know if this is a bug or more like a feature request. I’m not able to smaller rescale the view in the IR. For example, if I set my output dimension to 4000px, I can rescale the view in the final render with the + and i buttons in the toolbar.
In the IR however, this doesn’t work. It will start in full size and I can’t make it smaller. Because of that, I see myself changing the output dimensions to a smaller value, when I want to adjust something in my scene and change it back to my final output afterwards.
Not very convenient.
Known issue - to resolve for now at least, you can set a max size for IR so that it never is larger than that, and this saves you continually changing your final render resolution. Corona → Preferences → INTERACTIVE RENDERING section, Maximum Resolution (e.g. 1200 for 1200 wide).
Yep it’s a very old issue, maybe as old as Corona for C4D itself. I forgot it since like Tom suggested, I use the Max Resolution setting to ensure that IR is always responsive.
It would be nice to see the devs taking advantage of the v9 development to adress all these long standing issues ( nodal editor quirks, instances and motion blur, instances and IR etc. )