P: Automation in the Perspective Lens Correction

It would be nice to be able to just corner pin an image to fix perspective issues.
When the auto tools fail its time consuming to adjust h and v sliders to get the right effect when just pinning two corners would achieve the same result in seconds.

I concur. A possibility for manual correction by drawing lines (horizontally/vertically only, or complete "keystone correction") would be really nice for the cases when the automation does not work very well (don't get me wrong: the automation is great).

I STILL think we need this feature. The upright corrections often fail with interiror shots, which actually makes the process longer on the whole - often I will click on basic, click on auto, click on vertical, then click on off, click on manual and do the lens corrections. OY!

Yeah, this would be easy, and VERY helpful. LR already has the guts to do 3D perspective transformations, it just needs a UI, similar to the rotation alignment tool, but allowing 2 or 3 lines to be drawn instead of 1.

I've used the lens corrections / manual transform option to adjust perspective in LR3 (and briefly in LR4). Although it gets the job done, it seems to me to be an exercise in frustration to get it right... each transform seems to impact another dimension.
For an easy to use corrective tool - try the GIMP (need to tick the "correct" option) you just drag the mesh onto the straight lines in your image (no matter how skewed, and it corrects those lines to vericals and horzontals.
If the vertical or horizontal compression is off (usually only with excessive transforms) then you just run a separate single axis expand or compress. Much quicker to use.

LIGHTROOM: lens correction similar to drawing an angle in the crop tool: but instead you draw two vertical lines on 2 things that should be vertical in the photo (eg the 2 sides of a house taken with a wide angle lines and camera tilted up, the walls of the house converge). it should be possible to adjust the vertical transform until the lines are parallel, and then rotate the whole image until they are at 90 degrees to the baseline.

It looks like something similar was added to Photoshop 6 beta. I saw a demonstration of it for a merged panorama. It looked unnecessarily difficult to use.

In Lightroom, I would love to have the option to correct vertical perspective by clicking on points of vertical lines, adjusting rotation and vertical shift accordingly. Should be simple to implement and would save users a lot of time!

I would like to see a better function to correct perspective problems in Lightroom. It have been using DXO Optics Pro for several generations and it always had a better way to do that: Just click 4 points in your photo and "force to rectangle" - voilà! In Lightroom (also still in v4 beta) it is often not possible to get a satisfying result with the geometry tools Vertical/Horizontal correction as there often remains a skewed image.

Definitely an excellent idea. I came here just to suggest that feature and found this. It should be really easy to implement - you draw 2 straight vertical lines, Lightroom sets rotation and vertical shift to make those line vertical and parallel. Would save me a huge amount of time.