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General => Image Sharing => Topic started by: AP on October 13, 2015, 01:35:00 AM

Title: Arid Planet
Post by: AP on October 13, 2015, 01:35:00 AM
A work in progress. The clouds need some billowy tops here and there, trying to figure that out and that icing on the cake, procedural erosion.
Title: Re: Arid Planet
Post by: Kadri on October 13, 2015, 01:39:47 AM

Looks like a good start.
Title: Re: Arid Planet
Post by: AP on October 13, 2015, 05:12:11 AM
Thanks, i'm anticipating eroding it. In the meantime i will fix some other areas.
Title: Re: Arid Planet
Post by: Hannes on October 13, 2015, 05:31:51 AM
Looks fantastic so far. Maybe some more dramatic lighting to distinguish the clouds from the rest?
Title: Re: Arid Planet
Post by: AP on October 13, 2015, 05:35:02 AM
Curious, what did you have in mind?   
Title: Re: Arid Planet
Post by: Hannes on October 13, 2015, 05:38:26 AM
In your image the sun seems to be right behind the camera. Full frontal lighting so to speak. If the sun would be a little more on the side you'd get some cloud shadows and it would look even more interesting imho.
Title: Re: Arid Planet
Post by: Hannes on October 13, 2015, 05:39:27 AM
Btw, are your shadows disabled? There should be some even with the sun behind the camera.
Title: Re: Arid Planet
Post by: AP on October 13, 2015, 07:51:19 AM
Shadows are there but i will move the sun to have more distinctive shadows.
Title: Re: Arid Planet
Post by: Hannes on October 13, 2015, 07:52:27 AM
Cool! Looking forward to it.
Title: Re: Arid Planet
Post by: DocCharly65 on October 13, 2015, 12:13:56 PM
I could wait until the next upload with the moved sun but anyway it looks good !  :)
Title: Re: Arid Planet
Post by: Daniil on October 13, 2015, 01:44:28 PM
Quote from: Chris on October 13, 2015, 05:12:11 AM
Thanks, i'm anticipating eroding it. In the meantime i will fix some other areas.
Hello Chris,

I'd advise you not to count on procedural erosion shader too much, it isn't so great as one can think. It can be useful, but it isn't handy and very limited in possibilities.
Moreother, currently it even doesn't process infinite area. I'll add the support of much larger areas later.

And another bad thing. Currently it works with a planar projection and cannot be used to process a whole spherical planet. Although low-orbit views can be achieved with it.

Daniil.
Title: Re: Arid Planet
Post by: Oshyan on October 13, 2015, 02:47:55 PM
Last I tried it did work on a pretty large area Daniil. ;) But yes, not fully global yet. Still, from a well-chosen orbital view it can provide a still very nice effect IMO.

- Oshyan
Title: Re: Arid Planet
Post by: AP on October 13, 2015, 06:20:31 PM
Thanks for letting me know about this. I will have to come up with some alternative because i still want to create some type of channel effect along the slopes even if it is some noise and warping tricks. As how to go about that is anyone's guess.
Title: Re: Arid Planet
Post by: RArcher on October 13, 2015, 06:33:02 PM
Great looking planets.
Title: Re: Arid Planet
Post by: DocCharly65 on October 14, 2015, 02:54:27 AM
Much better.
...and your work inspired me  :)
Title: Re: Arid Planet
Post by: Daniil on October 14, 2015, 03:17:29 AM
Quote from: Oshyan on October 13, 2015, 02:47:55 PM
Still, from a well-chosen orbital view it can provide a still very nice effect IMO.
Quote from: Chris on October 13, 2015, 06:20:31 PM
I will have to come up with some alternative because i still want to create some type of channel effect along the slopes even if it is some noise and warping tricks. As how to go about that is anyone's guess.

Well, yes, for relatively low orbit it can be acceptable.
Here is a quick attempt. Of course better shading work is needed (with optional use of generated erosion maps), and may be also a masking of erosion.

Also it is need to tweak original terrain to achieve a better system of channels ending in the ocean.

Higher orbits will make more noticeable distortions.

Also, Chris, may be for your planet it is better to use some sort of Ulco's technology with using just maps generated by shader and then applying them as displacement.
Title: Re: Arid Planet
Post by: AP on October 14, 2015, 05:27:13 AM
That is not bad for what it represents as i need nothing fancy, just rather basic patterns perhaps. I understand the ocean part of it where the coast needs more smoothed shapes and some deltas.

Ulco's technology? Did i miss something.
Title: Re: Arid Planet
Post by: Daniil on October 14, 2015, 05:46:10 AM
Quote from: Chris on October 14, 2015, 05:27:13 AM
Ulco's technology? Did i miss something.

Ulco's rivers (or at least part of them) weren't made by direct processing terrain by erosion shader. He extracted flow map from it and drove it into displacement shader which was processing the original terrain. That is what I know, although he mentioned that things are more complex than just it.

Daniil.
Title: Re: Arid Planet
Post by: AP on October 14, 2015, 06:18:58 AM
Oh, yes, his river tests.   
Title: Re: Arid Planet
Post by: AP on October 15, 2015, 01:27:47 AM
Quote from: DocCharly65 on October 14, 2015, 02:54:27 AM
Much better.
...and your work inspired me  :)

That is always very good to hear such things.