Ok i know it is off-topic but if i understand what you just said correctly that means i cannot post examples of what i made in Paint.NET on here? I only use the images for school and i wont make any money with it so...

Image files using standard formats, such as 'png' and 'jpg', do not retain which editor was used on them. There is no way one can tell if one editor was used over another.

ok so when i use paint.NET to edit an img and then post it here without saying i edited it with paint.NET it is ok? and what if they find out that i used paint.NET to make something then post it here? considering to stop using paint.NET now...

I did not state anything about legality. If you accepted an agreement that stated that you would not share publicly any image that was edited with their editor, then you are bound by that agreement. If the agreement was just not to make any profit by such action, then the non-profit public sharing would not constitute a breach of contract. It actually is possible to embed a key within an image without changing it enough to be noticeable that could indicate which program edited it. But, if you had full control over all four color parts of each pixel, it would not be possible (this means it would have to support transparency).

Unless you break down the image editor application into its code and scour through it, you cannot say this. It is very possible, and even probable, that information can be hidden within an image; especially if transparency is used. The only color part that is necessary to make a pixel transparent is the alpha part. The other three parts (red, green, and blue) are open to be made any value without changing the visual image. Another way is to make any one or more color parts all even (or odd) and alter specific ones to embed a hidden code within the image without changing the image enough to be noticeable.

Hi all, It took me a while but i decided to stop with this project (for now) Reasons for me to stop: Its more work than i expected, MUCH more work, and because we dont have long to make this and i have close to no experience with Greenfoot it would take me to long. (yes i have made some parts but that was all for reasearch with code from others and because this project is for school.... I like school now and really want to learn something and "stealing" other's code without understanding what they do exactly and being unable to "fix" anything when its broken. I actually should say we because I am in a project group and we work with 5 man (4 others+me), but because i do the trucklevel for the biggest part i say I, but "we" decided that its better to change this level to another sort/type of level/game. Together we came to the idea that the truck can stay but now the truck wont move like in a sidescroller but only on the screen and the truck has to catch containers that fall down from the sky because a cranedriver was working to long and ram a pile of containers wich made them fall down and now the truckdriver has to catch the containers, first there will fall one container at the time but after X time or X number of containers the time will be shorter. I still need help with this, do i need to start a new topic or can i just continue on this one? And about the images... I remove the background with PhotoFiltre 7 then i load it without the background into Gimp and then i make its background invisable and then i export it as .PNG file wich works. Don't know why i cant just put the .PNG file from PF7 into Greenfoot and did also not yet discover how to remove the background propperly with Gimp but it works for now, TY for telling me the programs. And also thanks for all the help with the previous level/game. I also wanna say that when this project is done i would love to keep on working with Greenfoot and I hope i once can really finish the idea i wanted to make... also have a little question about the old trucklevel: I created an Explosion.gif file and When i use this .Gif program I can get it work inside Greenfoot but that's all, I won't know how it works dont know what it does etc. my question is, Is there a easier way to add a .gif file into greenfoot? I want to use this gif (hope it will display) if it wont work here is link click And no i dont mind using other's peoples code but only when i could make it next day without to much help, or with other words i dont want to use when i dont understand what its doing but when i do understand i want to if owner/maker allows it