Cycles render engine really needs a separate IPR or Frame Buffer

Let me just clear this out in the first line : I am not asking to remove the current Viewport rendering. I am just asking to add an IPR window with some useful features.

Blender's viewport rendering is great but it also causes a lot problems in the rendering workflow. Although with the Image Editor Panel some people have found a workaround to tackle a few of the problems mentioned below but those are very finicky and not an actual way to do these stuffs.

Why a separate IPR window is great :

IPR or Interactive Photorealistic Rendering is the most widely used workflow for rendering. A separate IPR may help with many things which the current method of doing rendering doesn't allow. Such as :

• You can't set a resolution to interact with your render. If you want to keep a low resolution and less render time you have to use the camera view to zoom out and lower the resolution but if you are too far zoomed out (Because your scene is very heavy) you can not see the whole image clearly. This is where an IPR comes in handy. You can set your desired rendering resolution and zoom in out anywhere in the image because it is only a 2D panel. It let's you see details without increasing the resolution and lowering render time.

• When we want to make Render Region other stuffs in the rendered image goes black and olny the render region is visible. For some people they might think this is good because it let's you focus on the specific region. But in the long run it causes a lot of problems. That's why almost all the render engines don't black out the outer part of the render region. Instead it keeps the rendered image visible and only renders the specific region. There can also be a passepartout to adjust how much of the Alpha you want.

• The Sidebar Panel (or the N panel) may have some useful features as well like small color grading, Render Layer management and a huge feature which might take Blender to the next level and that is LIGHT MIX .

• The bottom region of the IPR can be used to see the Preview of the render slots because remebering which slot has which image is very hard. That's why a preview of a render slot is very important.

• Then comes the Mouse Hovering feature. Suppose you want to render a part of the image qucikly than other areas and you want a falloff of rendering tiles to be in the same area where your mouse is. So when you hover in that area it renders quickly compared to other areas.

• And last of all BUTTONS . IPR window can have a lot of useful and easy to use buttons. Like Pause, Play, Stop and Refresh button. A separate dropdown of all the AOVs. Button for Bucket Rendering and Progressive rendering. Button for selecting a focus object . A Zoom Button. A Frame All Button. A Render Resolution Button. And the most useful button of all maybe the COMPARE SLOTS botton. This can make your workflow faster and can give a calm mind.

Giving an IPR window may not be that hard because blender already has a lot of fucntions built in to the Image Editor panel. Just adding some more functionality to it and making the render results separate will give an IPR like feel.