Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: cratered, rocky moon

  1. #1
      moutarde is offline
    Guild Adept moutarde's Avatar
    Join Date
    Oct 2009
    Location
    Vancouver
    Posts
    485

    Wip cratered, rocky moon

    Okay, so I've been attempting to create a moon image, with lots of impact craters on its surface, but I've been unable to create a result I'm happy with. I feel like I'm starting to get close, but I have a few issues that I've been unable to work around so far.

    The majority of this moon was made by following Ascension's planet-making tutorial.

    After rendering the clouds, I used the eye candy water drops filter to create a lot of circles, and use stylize->glowing edges to brighten the ridges before rendering the difference clouds. However, the water drops filter creates circles that are too large and too even, and I'm wondering if anyone here might have any suggestions on a method to use that doesn't involve the water drops filter.

    I found a few tutorials on craters in various places, but they all seem to require a little bit of hand-drawing talent that I don't possess
    Attached Thumbnails Attached Thumbnails cratered, rocky moon-test-moon.jpg  

  2. #2
      mearrin69 is offline
    Community Leader Gracious Donor mearrin69's Avatar
    Join Date
    Sep 2009
    Location
    Portland, OR
    Posts
    2,229

    Post

    It's not too bad at all really. I don't know of any filters (apart from Lunarcell by Flaming Pear) that will do it for you automatically. I'd go in with by hand with the smudge, blur, dodge, and burn tools and push things around a bit. Maybe even a little bit of hand touch-up with an irregular brush on low opacity. Barring that, check out Lunarcell.
    M

  3. #3
      moutarde is offline
    Guild Adept moutarde's Avatar
    Join Date
    Oct 2009
    Location
    Vancouver
    Posts
    485

    Default

    That's a really cool plugin Mearrin, thanks for the tip

  4. #4
      Ascension is offline
    Community Leader Ascension's Avatar
    Join Date
    Jun 2008
    Location
    St. Charles, MO
    Posts
    8,216

    Post

    I'd probably take out the 300-pixel airbrush, increase the spacing to 200% or more, set some scatter and some size jitter, and then make brush strokes...the result will be various size black dots but since it's an airbrush the edges will fade so the centers are black and therefore deeper. Set that layer to multiply and adjust opacity then merge down.
    If the radiance of a thousand suns was to burst at once into the sky, that would be like the splendor of the Mighty One...I am become Death, the Shatterer of worlds.
    -J. Robert Oppenheimer (father of the atom bomb) alluding to The Bhagavad Gita (Chapter 11, Verse 32)


    My Maps ~ My Brushes ~ My Tutorials ~ My Challenge Maps

  5. #5
      moutarde is offline
    Guild Adept moutarde's Avatar
    Join Date
    Oct 2009
    Location
    Vancouver
    Posts
    485

    Post

    Ooh that's a fantastic idea Ascension I'll have to give that a shot tomorrow.

    On a side note, here's what I was able to make by combining your tutorial with LunarCell:
    Attached Thumbnails Attached Thumbnails cratered, rocky moon-test-moon-2.jpg  

  6. #6
      jaspertjie is offline
    Guild Journeyer jaspertjie's Avatar
    Join Date
    Jan 2009
    Location
    Csemő
    Posts
    181

    Post

    I have the impression that it is actually not a sphere but a circle; the texture should be more curved at the edges.

  7. #7
    Guild Journeyer altasilvapuer's Avatar
    Join Date
    Mar 2009
    Location
    Augusta, GA
    Posts
    192

    Default

    I think the problem with the first one is that the craters are too perfectly spherical and unbroken. I could be mistaken, but if an impactor hits the surface at an angle, it will create a slightly elliptical crater, yes? Still mostly circular, but just slightly squashed.

    Also, the craters lack depth; it looks like there's a tiny ridge at the edge of each, but that otherwise the surface is a perfect sphere. If you're working with a flat map-image and then mapping it to a sphere, maybe try throwing some of the mountain tricks in the tutorial section (Pasis, et al) onto the ridges. That'll help the height of the ridges.

    If that doesn't fix the depth of the craters, you could also possibly run the spherize filter on individual craters one at a time, with a negative value (or the pinch filter, I believe, will do the same), to warp the texture into appearing more distant.

    I like the work so far, though; you're giving me a lot of ideas. Nice one!

    -asp
    My current worldbuilding experiment(s):
    Geidor
    --------------------------------------------

    But I, being poor, have only my dreams;
    I have spread my dreams under your feet;
    Tread softly because you tread on my dreams.
    -W.B. Yeats

  8. #8
      Redrobes is offline
    Software Dev/Rep Redrobes's Avatar
    Join Date
    Dec 2007
    Location
    England
    Posts
    4,763
    Blog Entries
    4

    Post

    Yeah my issue with the first one is that all the craters are unbroken. If you impacted the moon with random asteroids then even if the craters were circular then at the very least the liklyhood that each one drops and makes a crater in a previously uncratered area is very remote. At least if there was this many craters. Our moon has craters of all different sizes and some of the smaller ones are circular but the big ones are partial circles interrupted with more large craters. There is also age. Old craters tend to be flatter and more ragged and the new ones crisp and well defined. I don't know whether this would work but maybe add one crater crisp and sharp and then put a slight blur on then put the next one in at a completely random point even if it overlaps. Then blur slightly again and add another and keep going.

  9. #9
      moutarde is offline
    Guild Adept moutarde's Avatar
    Join Date
    Oct 2009
    Location
    Vancouver
    Posts
    485

    Default

    Thanks for all the great suggestions Lots of different things to try out, hopefully I'll be able to get some versions out soon, of the 'not-crappy' variety

  10. #10
      jbgibson is offline
    Guild Expert jbgibson's Avatar
    Join Date
    Oct 2009
    Location
    Alabama, USA
    Posts
    1,104

    Post

    In the shop I always figure no job is *really* a good one unless I have to get a new tool. In that vein, if a good cratered effect is Really Really important, consider getting Pro Fantasy's Fractal Terrains. It'll do single impact craters or wholesale bombardments. Not that I've ever generated a world then mercilessly pummeled it from above, no. Well, not many.

    If your cratered wasteland needs Truly Huge impacts, keep the size of the overall orb small, since I think the biggest crater it'll do is 1000 units (you can use miles or km as your default measurement system). That way the proportional size goes up. Though really if you want mares and plains, you'd do better to start with a low-roughness world and/or do some manual tweaking.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •