hey, is it possible to have a render history maybe back to 2 or 3 latest render so you can compare some changes without having to save them on the hard drive and open up images externally? (provided they have te same output resolution, so things wont get messed up)
maybe an A/B slider between the latest 2 renders, or just a stack history.
It's in the feature request tracker for sure. This would be great. Especially for using the paint tool and accurately painting on things via a good visual representation. I have to pause the preview anyway, otherwise if you hit a border while it's loading, you can paint the whole viewport, or erase it depending on tool.