The perspective correction tool incorporates 3 separate tools: Force parallel, Rectangle & 8-Points (where I think the latter may be available only if one also has DxO Viewpoint - tho, I’m not absolutely sure about that).
Question: Is there any point in using the Rectangle tool, when the 8-Point tool is available ??
they both achieve the same end result (in so far as I can tell)
tho, I find the 8-Point tool easier/simpler to apply.
so, in which circumstances, if any, would I be better off using the Rectangle tool ??
Tip: When using any of the Perspective tools, it’s helpful to firstly apply it automatically, using the “magic wand” button (on far right) - as this usually does a pretty good job at setting the verticals & horizontals.
I wanted to say that it may be easier with Rectangle to place the lines in the image where I think that it could be more difficult to ensure to place exactly the 4 independent lines in parallel of what we want.
I’ve asked this question myself a few times and came to the following conclusion:
force parallels has changed behavior: When I force verticals, the tool can also add some rotation. If I don’t want that, I use the 8 point tool (needs a VP license). Same thing for force horizontals too.
Force rectangle: I use this if (and almost only if) I have a explicit rectangle like a window or picture frame etc. in the image. I only need to adjust four points with this tool and I can draw the initial rectangle targeting two corners on the go.
8 point tool: I use this in most cases, also for “creative corrections”.
autocorrection: I find that it has improved but still does not work on all images. In these cases, I resort to the 8-point tool. Usually I try it only for either vertical or horizontal adjustments. BTW: Lightroom’s tool is similar (not perfect either)
Sliders in the perspective tool: I use these when I want a physically correct correction (assuming that DPL works correctly) because some rectangles might look like rectangles but are not…