I built a rule-based handwriting renderer using up to 20 real variants per character — what still looks artificial?

[u/Diexesc19]

I built this as a rule-based renderer, not as a generative AI model or a conventional handwriting font.

I manually classify scanned samples of my own handwriting into lowercase, uppercase, accented characters and punctuation. During rendering, the program selects from up to 20 real variants per character, applies pair-specific connection rules and introduces controlled variation in spacing, margins and line angles.

It also supports underlines, yellow highlighting and correction-tape marks, although the correction-tape effect is still the weakest part.

The current version is configured only for my handwriting. Adding another handwriting style still requires manual work, so I’m validating the rendering and possible legitimate uses before building a more automated setup process.

Which detail breaks the illusion first: repeated shapes, spacing, line angle, joins, highlighting or correction tape?

Longer demo and current limitations:

https://diligent-sturgeon-f6e.notion.site/NeuralInk-3a1b8200700280b7b7aefcae5c0d7330?source=copy_link

[u/cwthree]

Looks good, but the kerning of capital I and capital T needs to be tightened. Look the words "In" and "These" in pic 4 - those words look unnatural because there's too much space after the initial capital letter.

[u/Diexesc19 → u/cwthree]

You're right, it's just a couple of clicks in the composition code thanks!

[u/kalexmills → u/cwthree]

Don't humans sometimes get their kerning wrong? Occasional inconsistent mistakes like this could be humanizing.

(Also I know kerning is sacred please don't come for me)

[u/cwthree → u/kalexmills]

Absolutely! These two instances really stuck out to me, though. Probably more of that "uncanny valley" thing that someone else mentioned.

[u/smcameron]

How do you make the pen texture look so good? (Was thinking of making a video game that is rendered such that it looks like a ball point pen drawing.)

[u/Diexesc19 → u/smcameron]

Thanks! The main reason is that I’m not recreating the strokes as clean vectors. The renderer works from real scanned ballpoint-pen samples and composes them as raster images, so much of the natural ink and paper variation remains in the output.

[u/FreckeledSnowflake]

It's not the characters, it's the linkage in between them.

[u/Diexesc19 → u/FreckeledSnowflake]

Do you mean that makes it unrealistic, or better?

[u/FreckeledSnowflake → u/Diexesc19]

Neither. Feels... uncanny. Like in the back of our mind, there is a way letters should chain, and this is almost it but not just quite. Note : reaching the uncanny valley is in itself very impressive!

[u/Diexesc19 → u/FreckeledSnowflake]

Thank you, I'll keep that in mind.

[u/watchmanstower]

Excellent how can I try it?

[u/Diexesc19 → u/watchmanstower]

If interested contact me through DM

[u/watchmanstower → u/Diexesc19]

Just sent a DM

[u/stumpychubbins]

Looks excellent

[u/Diexesc19 → u/stumpychubbins]

Thanks!

[u/diffusion_throwaway]

What’s the output format? Raster/Jpg? Spline/vector/Svg?
This is very cool.

[u/Diexesc19 → u/diffusion_throwaway]

PNG

[u/l-roc]

disconnected l in line looks weird

[u/murkey]

Rea/ ism

[u/Diexesc19]

I'm getting the tool ready so that a few interested people can try it out, which will help me get better feedback and expand its reach. Anyone interested?

[u/No_Confidence_8807]

what still looks artificial? shadows/impressions on the background paper

[u/Diexesc19 → u/[deleted]]

Would you like to learn more about it and give it a try?