Smooth transitions between curved and straight lines?

[bpk101]

Always struggled with this but never got round to finding the solution. How do i avoid those strange optical bumps when joining a curved line to a straight line?

Best way to illustrate the problem is drawing a right angle then adding a rounded corner. Where the new rounded corner meets the straight line the transition between the two is too abrupt and creates an optical bump. It feels like the curvature needs to ease into the straight part instead of changing so abruptly but how do i draw this accurately and consistently across different curves and angles?

The red sketch attached is an exaggerated drawing of the bumps i'm seeing.

[Jacob Bugge]

pbk,

It looks fine to me, it may be a screen rendering issue.

Is it there at any zoom level (increasing with the level)?

Is GPU on (Ctrl/Cmd+E to toggle)?

Which Anchor Points can you see if you outline the stroke (there should be one at each end of the inner/outer curve)?

[bpk101]

No definitely not a screen rendering issue. I think this is quite a well known optical quirk when working with curves, i've seen type designers discuss it before. There's even a plug in to help with it (but not for Adobe CC):

https://yanone.de/software/speedpunk/

As the website above says "Taking off in a roller coaster from the flat into a perfect circle loop would brake your spine, as the curvature would infinitely increase from the straight line to a fixed amount of curve speed in the circle."

This is what i'm struggling with, getting the curvature optically right from a straight line to a curve.

[Ares Hovhannesyan]

Did you try them with Perfect Pixel? In some cases that can be helpful

[Monika Gause · Accepted solution]

You could try automatic translation on this German blog: https://www.fontblog.de/technik-design-und-erotik-der-ff-din-rundschrift/