Some recent tests

Dune · November 13, 2021, 02:30:02 AM

The test with the dunes will hopefully be followed up. I'm trying to make a setup for procedural parabolic dunes, where one end is low and sand is scooped out by wind and deposited at the other, downwind end, covering trees as it 'moves'. The voronoi and subvoronoi is an attempt to make the raised bogs found in Estonia and Siberia.
The crater one started out as a test for the parabolic dunes, but they turned into craters at one point and I thought, well, let's add some stuff.

Hannes · November 13, 2021, 03:55:13 AM

Wow!!!! They all look incredibly good, but the smoke columns blew me away!!! How did you do those. Was there already some kind of how to?

Dune · November 13, 2021, 07:16:03 AM

The smoke columns are simply derived from the voronoi I used for the craters. Use 1 octave PF voronoi to get some intial white 'dots', stretch Y, make craters by some color adjust and displacement mix, and lead a line to the cloud, use another color adjust to manage its diameter. Warp that cloud line over XZ.

I added some refinements, like a min altitude for a soft cloud and a max altitude for the harder cloud, and altitude restraints for the amount, direction and size of warp, but those are optional.

Hannes · November 13, 2021, 09:52:05 AM

Thanks a lot for the explanation, Ulco! Definitely something to share I'd say...

Lady of the Lake · November 13, 2021, 10:41:06 AM

I like the raised bog test. Very realistic.

WAS · November 13, 2021, 01:55:54 PM

Really cool stuff here. I too really like that bog.

pixelpusher636 · November 13, 2021, 05:56:22 PM

Those look fantastic! Really like the first image and the last.

Dune · November 14, 2021, 01:58:30 AM

Thanks all. Actually, the bog render is not the reality like in real raised bogs. It should have a voronoi structure. The voronoi billowy areas are sphagnum mosses growing into cussions, and the ridges are quite narrow and have trees and shrub. In the centers of the billowy parts there can be 'collapsed' lakes and pools. The one with the horses has that structure, but you can't really see that from low.

WAS · November 14, 2021, 04:21:42 AM

Quote from: Dune on November 14, 2021, 01:58:30 AMActually, the bog render is not the reality like in real raised bogs. It should have a voronoi structure.

That's what I'm trying to do now. Unfortunately the voronoi diff noise has weird areas I can't get with the soft maximum. Soft minimum works fine. Same for billows PF, it unfortunately has edges above 0 that I can't smooth, no matter the noise settings I try under tweak noise setting, even clamped or unclamped. Kinda sad.

Dune · November 14, 2021, 04:56:18 AM

You better use the PF for voronoi. That can be smoothed. But it's a pity the blues can't be smoothed indeed. And the problem with PF is that you can't get nice edges all around, like with the dif.
I ended up drawing a mask for voronoi shapes and another for the boundaries, with some extra precision.

WAS · November 14, 2021, 02:03:55 PM

I tried painting one but not going well with my mouse. I cant do my art pad cause its 4:3 and my computer is ultrawide. Can't seem to change to any standard resolutions, but games can.

Sooo screw this. Spent 2 hours figuring out how to UV map procedural noise (so it's perfectly seamless on a plane), and spent another hour baking the F1 Smooth voronoi from Blender. Works great so far.

These may help in future projects, Ulco: https://planetside.co.uk/forums/index.php/topic,29647.msg290540.html

Dune · November 15, 2021, 01:56:58 AM

Thanks Jordan, I found them.

mhaze · November 15, 2021, 06:26:31 AM

Terrific - that smake is superb!