PNG glitch ?

machinegunkellymachinegunkelly Member Posts: 56
edited June 2012 in Working with GS (Mac)
Hey all,

I've noticed a glitch in my game ( and a few made with gamesalad that are live in app stores )

Basically the glitch appears on the edge of some transparent PNG images... and it sorta highlights where that image starts..

basically I have a cloud image, and at the very edge of it , while animating sometimes a yellow sorta glitchy line will appear on the edge of that image..

I've noticed this in other gamesalad games, even on the Appstore, so I'm pretty sure it's nothing I've done with my game specifically, but was wondering if anyone had come across this..

You can view the same bug I'm talking about in Cheezeman, which I've downloaded and been playing the heck out of!! great game, but it also has this glitch, on the main character at times... basically looks like a little line a few pixels from the character, mostly in a run state in cheezeman :P

Any ideas of what causes this? Photoshop exporting as wrong bit size? etc ?
any help would be appreciated ...

Best Answer

  • fadamionfadamion Posts: 309
    Accepted Answer
    Are your image sizes like suggested? 64x64 128x128 so on and can they be divided 44 not 45? I would test that.

Answers

  • machinegunkellymachinegunkelly Member Posts: 56
    I'm pretty sure that's not the issue, but I'll go back and have another look at some point today, I've been pretty careful with the art though, cause I'm trying to "push the limits" of gamesalad graphics so have been careful to optimize my art.

    Will look and post back at some point today Thanks :)
  • andrewm2211andrewm2211 Member Posts: 341
    Interesting maybe a premult issue?

    Are you doing any color correction or changes inside GS

    Try and unpremult the image and see what that does.
  • machinegunkellymachinegunkelly Member Posts: 56
    I dunno what Premult is but no, there are no color functions on the cloud, it's a simple cloud that scrolls the screen.

    if you'd like to see an example of this bug in action, checkout Cheezeman, and turn your character so he's aimed to the left.... you'll see a little line of pixels that glitch out on his left side...

  • The_Gamesalad_GuruThe_Gamesalad_Guru Member Posts: 9,922
    @machinegunkelly did you play Socom? Do you remember rat's ass? :-bd
  • machinegunkellymachinegunkelly Member Posts: 56
    Never played Socom Sadly :P
    Always wanted to look at the latest one, but it's PS3 only :P


    This glitch has just disappeared for me, so I don't know if the update fixed it or what, but it's gone... if it happens again I'll check everything out...

    Art sizes did seem just fine though when I checked them.
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