Rune Skovbo JohansenMar 30

My erosion filter is out! Video, blog post, and shader source.

It emulates erosion without simulation, so it's fast, GPU friendly, and trivial to generate in chunks.

Explainer video:
https://www.youtube.com/watch?v=r4V21_uUK8Y

Companion blog post:
https://blog.runevision.com/2026/03/fast-and-gorgeous-erosion-filter.html

#ProcGen #vfx #GameDev

Show threadRune Skovbo Johansen

Here's the Shadertoy where you can paint eroded mountains and islands with your mouse, right in the browser:
https://www.shadertoy.com/view/sf23W1

#ProcGen #vfx #GameDev

Mar 30 at 2:49pmWeb
Show threadRune Skovbo JohansenMar 31

Here's the other Shadertoy, that shows off various animated parameter changes in erosion strength, scale, detail, and ridge and crease rounding.
https://www.shadertoy.com/view/wXcfWn

(You can temporarily control the camera angle while dragging with the mouse.)

#ProcGen #vfx #GameDev

Show threadNick LudlamMar 31
@runevision In terms of The Big Forest, are we going to be able to walk down roads carving their way along your eroded mountains?
Show threadRune Skovbo JohansenMar 31
@nick Probably, in some form! The terrain in The Big Forest will be generated primarily based on level design, but I want to try to apply erosion in a subtle way.
Show threadNick LudlamMar 31
@runevision Aah, I didn't realise there was level design happening in TBF. For some reason I had assumed it was all seed based
Show threadRune Skovbo JohansenMar 31
@nick It is, I mean procedural level design. :)
Show threadrojunMar 30
@runevision @lisyarus
Show threadAras PranckevičiusMar 30
@runevision most excellent. Did I tell you that you have a superpower of going really deep into rabbit holes like that, emerging with fantastic stuff?
Show threadRune Skovbo JohansenMar 30

@aras Thanks a lot Aras! Yeah I think you have mentioned it before :)

My skills as a programmer are very spotty and uneven, but I do try to make the most of the things I excel at, and am fortunate to be in a position where I can focus on that.

Now, if I could also learn one day how to do profiling properly...

Show threadBen ThroopMar 30

@runevision I agree. Superpower!

This is awesome. I want to use it.

Show threadRune Skovbo JohansenMar 30
@benthroop Please do! Would love to see that! :)
Show threadzen_mMar 31
@aras @runevision I love just reading Rune's articles and posts, seeing all the shapes and terrains take form. I may not use ProcGen in my current projects but it feeds the mind and keeps me thinking and appreciating beauty. Thank you, Rune.
Show threadpaperManuMar 31
@runevision Is that... Terragen in a (few) shader(s)? I love it!
Show threadJake in the desertMar 31
@runevision woww this is amazing!
Show threadAdam CafollaMar 31

@runevision

This looks really great, good job.

Look forward to reading about it.

Show threadAdam CafollaMar 31

@runevision

I've read the post now. Fantastic work. Probably the best, most realistic, looking terrain generation I've seen.