Vignette incorrect in live view

[boxfx]

It seems the vignette effect is being applied to the entire live view window, this means that unless my live view is perfectly sized, I will get a different brightness in my image when it comes to final renders.

Here is my live view as docked into my interface,

and here it is when resized to the render aspect ratio, you can see significant differences between them.

Maybe if you don't want to file this one as a bug report, could it go down as an idea to add an option for the live view window to only render images to the aspect ratio of the project. ie dont render anything in the blacked off area. I know there is the padlock icon but that locks it to a specific pixel resolution, not an aspect ratio, so I have to keep messing with my render settings to get the image to fit the live view.

basic scene attached

octane 2023.1.3 R2
c4d 2024.4.0
ge 4090

[aoktar]

See the picture and tell me if you need more explanation

[boxfx]

I 100% understand why this is happening. Thats why im asking for a way to make the live view only render the area which represents what the final render will be. Currently I am wasting time rendering an area outside of what will actually be rendered, slowing down my test renders. It also means that various effects such as vignette and glow will show inaccurate results as these effects are taking into account parts of the image which will not be rendered in the final exports.

TLDR; I would like a button to restrict Live Viewer rendering to the area that will actually be rendered. This would make results faster and more accurate.

[aoktar]

Use LOCK RES button and adjust with scale parameter to fit in to view. That's why we have it!

I 100% understand why this is happening. Thats why im asking for a way to make the live view only render the area which represents what the final render will be. Currently I am wasting time rendering an area outside of what will actually be rendered, slowing down my test renders. It also means that various effects such as vignette and glow will show inaccurate results as these effects are taking into account parts of the image which will not be rendered in the final exports.

TLDR; I would like a button to restrict Live Viewer rendering to the area that will actually be rendered. This would make results faster and more accurate.

[boxfx]

I am working on 8k images. I cannot use the lock res button, otherwise all my realtime test renders will be generated at 8k resolution, the fact I can scale the 8k render down to fit the live view window is completely missing the point, I don't want my test renders to take 20x longer than they need.

Lowering my render settings resolution is also a bad solution:
I am 100% going to forget to raise it again for the final render
I work on multiple machines, I cannot pick a single resolution which works on both a laptop and dual screen desktop
I resize the live view window as needed for wide screen or portrait aspect jobs
I don't want to keep playing "guess the resolution of the live view window" to make it fit

I mean while we're on the topic, why does this work fine:

But If I go the other way, it just chops off my image:

This would be far more useful:

[aoktar]

You have scale parameter side to lockres icon. You can enter a value like 0.1 or so. Then you will have same proportion at small size but final resolution will be original sized.

[boxfx]

These are all clunky workarounds to the basic problem. As soon as more than 1 computer or 1 person is involved in a project I suddenly have to deal with all the settings they have dialled in to make the live view window fit their personal software layout.

My requests still stands, please offer the option to render to the live view with the correct aspect ratio and only render the part that is visible in the final render