Thinking about this, I remembered an article in the dear, departed ... and severely lamented Camera and Darkroom, expressly about easel tilting and its comparison to view camera tilts, swings, rise, fall ... and other esoteric "jiggling". The tiltle of the articel WAS "The Brick Trick".
Simple easel tilting is effective to a point; the correction of *all* errors that would, more or less, be corrected by T,S & R,F are not possible by this method... but *significant* improvements in "falling down" buildings, for example, can be realized.
I remember an "architectural" photograph, with pronounced convergence of vertical lines, as the camera was *much* below the center. They then corrected in camera and took another image. They took the first "converging" image and tried to correct to the same degree by easel tilting.
The result: Almost! All vertical lines in the in-camera corrected image were perpendicular and nearly parallel.
One (1) dormer on the roof of the tilted image was not, but the overall improvement was well worth the effort.
I *miss* Camera and Darkroom.