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General => Image Sharing => Topic started by: Dune on May 11, 2018, 06:36:56 AM

Title: Voronoi Rock, inspired by René
Post by: Dune on May 11, 2018, 06:36:56 AM
As the title says. The hard fractal warp additions to a base voronoi works really well.
Title: Re: Voronoi Rock, inspired by René
Post by: Matt on May 11, 2018, 07:05:35 AM
The bright colours are refreshing. With a new technique come new eyes, it seems! :)

Matt
Title: Re: Voronoi Rock, inspired by René
Post by: Jo Kariboo on May 11, 2018, 12:55:16 PM
Very nice exploration! I like your original colors!
Title: Re: Voronoi Rock, inspired by René
Post by: Kadri on May 11, 2018, 12:58:55 PM

Looks great and your colour choice is really different then your other work.
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 12, 2018, 06:03:47 AM
https://www.google.com/search?q=orange+lichen&client=firefox-b-ab&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi3iNPkv__aAhWRYVAKHfSbDwMQ_AUICigB&biw=1920&bih=1081#imgrc=2TKr0f8f5hxq4M: (https://www.google.com/search?q=orange+lichen&client=firefox-b-ab&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi3iNPkv__aAhWRYVAKHfSbDwMQ_AUICigB&biw=1920&bih=1081#imgrc=2TKr0f8f5hxq4M:)

Perhaps I need to darken the lichen a bit, btw.
Title: Re: Voronoi Rock, inspired by René
Post by: WASasquatch on May 12, 2018, 07:50:16 AM
That last shot brings it all together. Really like these. I use to do a lot of voronoi rocks, been awhile.

(http://www.eastlondonnature.co.uk/wp-content/files_mf/1287090497Lichens.jpg)

Just a note, those weirdly shaped lichen could be possibly achieved with a warp shader and alpine displacement by the way. Both for colour, and perhaps into a displacement shader for displacement (or base displacement on a PF if it's not too warped). Round shapes maybe not so much, but could be mixed in from voronoi plumes and offset masks.
Title: Re: Voronoi Rock, inspired by René
Post by: René on May 13, 2018, 09:47:01 AM
I think the last, test4, is the best, although I find the bright yellow somewhat distracting. Did you use Voronoi billows for the lichen? Perhaps if you make a transition from the yellow on the outside to a darker and less saturated colour in the middle. :)
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 13, 2018, 01:42:13 PM
I can understand that. It would be nicer if there were just one or two lichened rocks and grasses for the rest. I have to do some work on those anyway. They are not voronoi, but normal billowed pf. Voronoi might be better, perhaps even the blue node voronoi.
Title: Re: Voronoi Rock, inspired by René
Post by: Oshyan on May 13, 2018, 11:13:20 PM
Lichen come in a wide variety of colors, including something similar to what you used in your images. Though it's a tad bright/"neon" and too uniform. It should be broken up and slightly desaturated, perhaps. But the basic color is pretty correct, again depending on the variety/species of lichen and its location.

https://www.google.com/search?q=lichen+sierra+nevada&tbm=isch&source=iu&ictx=1&fir=uqL8Y1jbhdCayM%253A%252CoNwH2MTzUd8zKM%252C_&usg=__3AZ_Ag3kgwqT_uTFx26yHwIPRCM%3D&sa=X&ved=0ahUKEwiBtMGU6IPbAhXLwlQKHbytAr0Q9QEISzAE#imgrc=uqL8Y1jbhdCayM:

- Oshyan
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 15, 2018, 05:35:20 AM
Thanks Oshyan. I've worked on the lichen a bit more (though in this iteration, I may have masked out too much). I noticed that I did use the voronoi billows after all, but now applied a little warp to get the 'fringed' edges.
Color variety is enormous, but may also depend on the photography. I also attempted to get less saturated centres, with fringes that were freshly colored, succeeded a bit, but I didn't find it the case in many lichens, so I dropped it again.
Title: Re: Voronoi Rock, inspired by René
Post by: DocCharly65 on May 15, 2018, 06:13:38 AM
Very beautiful! I like the rocks and the vegetation. Cool devlopment of the lichen!
Title: Re: Voronoi Rock, inspired by René
Post by: mhaze on May 15, 2018, 08:21:41 AM
Beautiful. Best lichen so far.
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 15, 2018, 12:33:10 PM
Thanks. Another iteration.
Title: Re: Voronoi Rock, inspired by René
Post by: archonforest on May 15, 2018, 12:41:44 PM
what a bloody scene ;D
Title: Re: Voronoi Rock, inspired by René
Post by: Kadri on May 15, 2018, 01:04:08 PM
 ;D
Nice.
Title: Re: Voronoi Rock, inspired by René
Post by: bobbystahr on May 15, 2018, 04:06:31 PM
https://www.google.com/search?q=orange+lichen&client=firefox-b-ab&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi3iNPkv__aAhWRYVAKHfSbDwMQ_AUICigB&biw=1920&bih=1081#imgrc=2TKr0f8f5hxq4M: (https://www.google.com/search?q=orange+lichen&client=firefox-b-ab&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi3iNPkv__aAhWRYVAKHfSbDwMQ_AUICigB&biw=1920&bih=1081#imgrc=2TKr0f8f5hxq4M:)

Perhaps I need to darken the lichen a bit, btw.

more like it needs that bright halo around the main slightly darker tone...as in the photo
Title: Re: Voronoi Rock, inspired by René
Post by: Oshyan on May 15, 2018, 07:16:43 PM
Having seen a lot of this kind of lichen in person, I think all this really needs is some breakup and darker+lighter rough elements (especially the latter) in each patch. If you look closely at this kind of lichen it has dark and sometimes light(er) parts, especially at the edges, and although it appears flat, technically it has a little depth, and you see the darker stuff from the side especially ("underneath").

- Oshyan
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 16, 2018, 06:00:21 AM
Yes, it's too uniform still. But there's depth; offset and small displacement, slightly different in each 'species', you just don't see it well on this scale.
Title: Re: Voronoi Rock, inspired by René
Post by: Hannes on May 16, 2018, 12:53:47 PM
I think this is a tough one. Making the lichen look realistic without the impression of a paintball playground is quite difficult I assume...
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 17, 2018, 04:53:02 AM
Yes, indeed. I think it's better suited for loose rocks, or on tree trunks or so.
Anyway, got it working with the centers dying out again, and three species non overlapping. I do think the patch size should be increased. It's a very diverse size now, but can also be pretty all-the-same.
The big one (7) has some nasty cracks, which I took out in the smaller test. Done with this again.
Title: Re: Voronoi Rock, inspired by René
Post by: René on May 17, 2018, 11:06:46 AM
You nailed it! The lichen looks much better in the last two images. Sometimes simple things can be quite difficult. :)
Title: Re: Voronoi Rock, inspired by René
Post by: Hannes on May 17, 2018, 01:01:29 PM
Agreed. Looks way better now.
Title: Re: Voronoi Rock, inspired by René
Post by: DocCharly65 on May 17, 2018, 01:10:20 PM
I compared with some of bobbys links and I can say: your's are really good looking lichen! :)
Title: Re: Voronoi Rock, inspired by René
Post by: Oshyan on May 17, 2018, 10:37:53 PM
Yep, much better and quite realistic now! Just need to perfect the rock surface they're sitting on and you've got photorealism. :D

- Oshyan
Title: Re: Voronoi Rock, inspired by René
Post by: Kadri on May 17, 2018, 11:57:52 PM

Looks good Ulco.
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 18, 2018, 05:21:27 AM
I've zoomed in a bit (and increased sizes and made a more regular lichen base shape), but have an issue now. There's a lot of 'speckling', also in the preview it looks like the triangles are torn apart. Strange, and I'm trying to find out what it is. May have to do with the basic voronoi.
Also there are regular patterns in the rock, but I think those are due to smallscale displacements and the 256 limit, so every 256 (what?) the pattern is repeated. I may have to mix two of those patterns to see if it goes.

About the lichen colors; I also found that if I pick the color values from photo's (PS), in TG they always turn up too bright. So the yellow is too bright again.
Title: Re: Voronoi Rock, inspired by René
Post by: Kadri on May 18, 2018, 06:12:59 AM

Are the scales too small? You might remember an old thread when going too close-small scale there was a distinctive look.
Not sure if this is still the case or even related although.
Title: Re: Voronoi Rock, inspired by René
Post by: René on May 18, 2018, 08:25:11 AM
I've zoomed in a bit (and increased sizes and made a more regular lichen base shape), but have an issue now. There's a lot of 'speckling', also in the preview it looks like the triangles are torn apart.

Is it possible that you are inside of something?
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 18, 2018, 09:58:17 AM
No, cam is not inside a rock or so. Scales may be too small somewhere indeed, I will have a look. At first I thought I found the culprit; a color adjust, but apparently in the latest test there's still the tiny dots. I will investigate further....  >:(
Title: Re: Voronoi Rock, inspired by René
Post by: Kadri on May 18, 2018, 10:22:12 AM

This was the thread and what Matt said about it Ulco:
https://planetside.co.uk/forums/index.php/topic,18196.msg176918.html#msg176918
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 18, 2018, 12:56:01 PM
That may well be the thing! Thanks Kadri!
Title: Re: Voronoi Rock, inspired by René
Post by: Hannes on May 19, 2018, 09:22:28 AM
The last one looks great. Though I'm not sure about the pink stuff.
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 19, 2018, 07:24:41 PM
It's Pink Spaghetti Rock  ;D
Title: Re: Voronoi Rock, inspired by René
Post by: WASasquatch on May 19, 2018, 08:36:26 PM
No, cam is not inside a rock or so. Scales may be too small somewhere indeed, I will have a look. At first I thought I found the culprit; a color adjust, but apparently in the latest test there's still the tiny dots. I will investigate further....  >:(

Just a observation, cause I still think this is really nice. Maybe the pink quartz veins could be offset negatively a tiny bit, as quartz wears faster than it's host rock in most cases.
Title: Re: Voronoi Rock, inspired by René
Post by: Dune on May 20, 2018, 05:28:53 AM
It crossed my mind to do just that, but didn't get to it (or decided againts), but you're quite right. I also thought to make it marble, but actually it was just about the lichen.