I have discovered some strange behavior in the outermost lines that converge in 3-point perspective.
This pertains specifically to those lines that form the vertical convergence; i.e., the vanishing point that is way up high above the image.
So, when I grab the handle to move the left outermost line, the line itself disappears maybe 20% from the left edge of the image.
The handles are still there, but the line is gone.
Then, when I move this left line rightward, the line reappears! It's as if something is hiding it if it moves too far left. Strangely, the RIGHT outermost perspective line for this same VP stays visible at all angles.
It seems like a bug to me, but maybe there's a logical explanation.
I'm open to any guidance you may have.
Cheers from Houston,
Windows 10 Pro, Painter 2022
Hello Steve, sorry I am not able to recreate this issue. I tried moving all of the lines with the various handles but I don't get any disappearing lines. If you can send a video, that would be helpful.
OK, I see what's happening.
When I zoom WAY out -- so far that my picture actually disappears -- I see that my dragged outer perspective line flips over to the other side of the angle!
As you know, the line being dragged turns red, so I can see that when I make it wider than a certain angle, it immediately reappears on the other side of that same angle.
I hope my description is clear 'cause it's hard to describe in words what is happening.
Anyway, now that I understand this behavior, I can deal with it. The bottom line is: There is something that you can do if your perspective line vanishes while you change the angle (leading to the vanishing point).
What you need to do is zoom out so you can see your selected line flip to the other side.
Wow! I guess 'ya learn something every day! (Thank goodness.)