I managed to fix the Problem by re-creating my Texture as a 32-bit PNG file instead of the Paint.net default of 24-bit.

 

Its now working as intended.

 

Maybe you guys should state somewhere that 24-bit PNG files will not be accepted.

Minecraft only accepts multiples of 16.

 

He's talking color depth, not pixel dimensions.

http://stackoverflow.com/questions/22707130/what-is-difference-between-png8-and-png24

Alright that is me being ignorant...I was not aware there was a 32 bit when it came to pngs. My image editor has an auto-detect for that so it doesn't ask for input, and I am by no means an image design person.

Alright that is me being ignorant...I was not aware there was a 32 bit when it came to pngs. My image editor has an auto-detect for that so it doesn't ask for input, and I am by no means an image design person.

 

Most people aren't aware of it.

Also, the difference between PNG-24 and PNG-32 is that PNG-32 supports transparency (the link earlier was 8 vs. 24, which is color depth; still true going to 32, but its about where those 8 bits get assigned).  PNG-24 should work and I suspect that merely re-saving the image fixed things.  But for shits and giggles I stripped the alpha off one of my textures in GIMP to see what happens (GIMP automatically selects PNG-24 or 32 based on whether or not any layer has an alpha channel).

 

And....loaded in just fine.

Alright that is me being ignorant...I was not aware there was a 32 bit when it came to pngs. My image editor has an auto-detect for that so it doesn't ask for input, and I am by no means an image design person.

 

Most people aren't aware of it.

Also, the difference between PNG-24 and PNG-32 is that PNG-32 supports transparency (the link earlier was 8 vs. 24, which is color depth; still true going to 32, but its about where those 8 bits get assigned).  PNG-24 should work and I suspect that merely re-saving the image fixed things.  But for shits and giggles I stripped the alpha off one of my textures in GIMP to see what happens (GIMP automatically selects PNG-24 or 32 based on whether or not any layer has an alpha channel).

 

And....loaded in just fine.

Yes I went and looked for myself what the PNG-32 is, but thank you for explanation. It definitely assures what I read. And that would most likely be the case then.

Ive not been refering to the qword Bit wrongly.

All my Textures are, of course 16x16px in size.

Though it apparently made a difference wether the color Depth was 24bit or 32bit. Because 24bit allways return "Bad PNG signature" during stitching for me.

 

Using 32bit color depth mitigates this problem and all textures work as intended.

Odd.  Mind posting that (bad) texture somewhere? (if its in a git repo, just link me to the texture there).

I'd be interested in poking at it.