(and, sorry if i sound presumptuous, but i think i have great familiarity with the task.)
That's not presumptuous, you're the perfect person for this test. :)
It looks like the last .gif (black background) has some frame position decay. Toward the end of the animation the frames are vertically shifting out of position. I am hoping that is just the result of entering a slightly inaccurate frame height value (one pixel too many?).
i can't put more than 5400 cels in a spritesheet and therefore i'm not allowed to laugh like a pirate and shout: "16384? HA! that's not even warm up!" ;)
Hahaha! Thank goodness! I was worried you'd still be able to overwhelm the script. :D These are great results. Better than I expected, to be honest. I know it isn't going to be as high quality as the hardcore processing you can do, but like you said, the selling point is the simplicity and the fact it is nearly impossible to make mistakes.
Please do not tag yourself. If someone needs to find your work, there is a search field dedicated specifically to the submitter/author name. See https://opengameart.org/content/art-tags
@Puffolotti: Oh, wow! Why didn't I think to stress test this script with one of your famous 5000+ cell spritesheet monsters?
Yeah, it took a while but it worked great for me... though I naively assumed no one would ever have more than 1024 frames in a sheet. :/ I had to update the script with a new maximum of 16384 frames, so be sure to redo steps #4, #5, and #6 to get the latest version. I didn't do the same spritesheet as the one you've indicated above, so by all means, still give that a test. Let me know how it goes for you.
Keep in mind these are previews, so there really shouldn't be transparency at all. It's just wasting those precious indexed color slots and looks terrible outside of an actual game anyway. The gif I did above didn't have any issue with 256 colors, but I haven't tired any others yet.
Oh, sure. I used GIMP, but I sliced them up myself. Do you have access to each frame as a separate png file or are these combined spritesheets the only form you've dealt with? It makes the manual process easier if you can get them pre-sliced into individual frames, but if not, I'll see if I can make you a GIMP plugin for making a spritesheet into an animated gif quickly. I'll probably end up using it a lot myself, so it's about time I made something like that.
That's not presumptuous, you're the perfect person for this test. :)
It looks like the last .gif (black background) has some frame position decay. Toward the end of the animation the frames are vertically shifting out of position. I am hoping that is just the result of entering a slightly inaccurate frame height value (one pixel too many?).
Hahaha! Thank goodness! I was worried you'd still be able to overwhelm the script. :D These are great results. Better than I expected, to be honest. I know it isn't going to be as high quality as the hardcore processing you can do, but like you said, the selling point is the simplicity and the fact it is nearly impossible to make mistakes.
Yuss. Lovely, thank you.
I would love that. It'll allow me to animate these planets rotating on any arbitrary axis in-game. :)
Nice! Do you also have the surface textures available?
Not a bad progress/health bar.
Please do not tag yourself. If someone needs to find your work, there is a search field dedicated specifically to the submitter/author name. See https://opengameart.org/content/art-tags
@Puffolotti: Oh, wow! Why didn't I think to stress test this script with one of your famous 5000+ cell spritesheet monsters?
Yeah, it took a while but it worked great for me... though I naively assumed no one would ever have more than 1024 frames in a sheet. :/ I had to update the script with a new maximum of 16384 frames, so be sure to redo steps #4, #5, and #6 to get the latest version. I didn't do the same spritesheet as the one you've indicated above, so by all means, still give that a test. Let me know how it goes for you.

@LordNeo, would you be willing to add the preview file to the downloads section as well?
Ok, here is my free GIMP-plugin solution for this, as discussed: https://opengameart.org/forumtopic/gimp-script-for-making-animated-previews
Nothing as fancy as Puffolotti's. Tried to make it as simple as possible. :)
Keep in mind these are previews, so there really shouldn't be transparency at all. It's just wasting those precious indexed color slots and looks terrible outside of an actual game anyway. The gif I did above didn't have any issue with 256 colors, but I haven't tired any others yet.
Oh, sure. I used GIMP, but I sliced them up myself. Do you have access to each frame as a separate png file or are these combined spritesheets the only form you've dealt with? It makes the manual process easier if you can get them pre-sliced into individual frames, but if not, I'll see if I can make you a GIMP plugin for making a spritesheet into an animated gif quickly. I'll probably end up using it a lot myself, so it's about time I made something like that.
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