Results 1 to 8 of 8

Thread: Quick PS brush question

  1. #1
      Ramah is offline
    Guild Expert Ramah's Avatar
    Join Date
    Mar 2009
    Location
    Nottinghamshire
    Posts
    1,327
    Blog Entries
    3

    Post Quick PS brush question

    I was wondering if someone could answer an annoyance I've had for a while when using brushes with PS.

    I made a few forest brushes out of multiple tree brushes but when I place these brushes the sharpness of the resulting image can differ immensely. I have every option turned off in the brush dialog, so I have no size jittering, opacity changing, wet edges... nothing. But if I place the brush 10 times I can get 10 different images, ranging from pin sharp to looking like it's had a 1px gaussian on it.
    I would have thought, that with all controls of the brush turned off then it would repeat exactly the same every time.

    Does anyone know why it doesn't? And more importantly, does anyone know of a way I can make it so that it does?
    Royal: I'm very sorry for your loss, your mother was a terribly attractive woman.


    My Cartographer's Guild maps: Finished Maps


    More maps viewable at my DeviantArt page: Ramah-Palmer DeviantArt

  2. #2
      Daelin is offline
    Guild Journeyer Daelin's Avatar
    Join Date
    Jun 2009
    Location
    Denmark
    Posts
    221

    Post

    It's not a problem specific to PS, I experience it with GIMP as well. It has to do with where you place the brush in relation to the pixels. Look at the attached, for example. The dots are all placed with the same 1x1 smooth brush. It's one of the downsides with raster-based programs like PS and GIMP. Vector-programs, like InkScape don't have this problem, because vectors are infinitely scalable.
    Attached Thumbnails Attached Thumbnails Quick PS brush question-kkk.jpg  
    Last edited by Daelin; 11-24-2009 at 06:00 PM.

  3. #3
      Ascension is offline
    Community Leader Ascension's Avatar
    Join Date
    Jun 2008
    Location
    St. Charles, MO
    Posts
    8,216

    Post

    Interesting. It's sort of like putting the dot of the brush between two pixels and the software makes it fit by blurring it. I've never had this problem in PS CS, but I don't use mountain brushes either. I'll have to see if I get similar results on an experiment.
    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

  4. #4
    Guild Master Gracious Donor Midgardsormr's Avatar
    Join Date
    Aug 2007
    Location
    Los Angeles, CA
    Posts
    2,406

    Post

    Try the Pencil tool instead, it doesn't automatically anti-alias the edges.

    You were wondering what it was for, weren't you? (-;
    Bryan Ray, visual effects artist
    http://www.bryanray.name

  5. #5
      RobA is offline
    Administrator RobA's Avatar
    Join Date
    Apr 2007
    Location
    Niagara, Canada
    Posts
    5,532

    Post

    Quote Originally Posted by Daelin View Post
    Vector-programs, like InkScape don't have this problem, because vectors are infinitely scalable.
    Though they will still have this problem if elements are on on pixel boundaries when being exported as a raster (which is how they are normally used).

    For Inkscape, there is a nice extension called PixelSnap http://code.google.com/p/pixelsnap/ that will take all the objects and align them to pixel edges to stop them from exporting fuzzy.

    -Rob A>

  6. #6
      Ramah is offline
    Guild Expert Ramah's Avatar
    Join Date
    Mar 2009
    Location
    Nottinghamshire
    Posts
    1,327
    Blog Entries
    3

    Post

    Quote Originally Posted by Midgardsormr View Post
    Try the Pencil tool instead, it doesn't automatically anti-alias the edges.

    You were wondering what it was for, weren't you? (-;
    This doesn't work. It's crystal sharp yes, but it loses all the mid-range tones of the brush.

    So basically, I'm stuck with placing and replacing a brush until I manage to get it smack bang in the correct part of the pixel? :s

    There ought to be a Snap to Pixel command or something. Gah.
    Royal: I'm very sorry for your loss, your mother was a terribly attractive woman.


    My Cartographer's Guild maps: Finished Maps


    More maps viewable at my DeviantArt page: Ramah-Palmer DeviantArt

  7. #7
    Guild Master Gracious Donor Midgardsormr's Avatar
    Join Date
    Aug 2007
    Location
    Los Angeles, CA
    Posts
    2,406

    Post

    I see.

    I don't see any options for turning off subpixel accuracy, so I suspect the best solution is to work at a higher resolution.
    Bryan Ray, visual effects artist
    http://www.bryanray.name

  8. #8
      Daelin is offline
    Guild Journeyer Daelin's Avatar
    Join Date
    Jun 2009
    Location
    Denmark
    Posts
    221

    Post

    Yeah, working at a higher resolution and then scaling the image down gets rid of the problem. Alternately, you could draw one brush that fits your sharpness/blur needs and then copy/paste that, that you give the "snap-to" option. You would have to do this with each of the different brushes, of course.
    Last edited by Daelin; 11-25-2009 at 01:00 PM.

Posting Permissions

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