trying to use the img tag but it doesn't work with dropbox somehow

Sorry for my bad English...

Are you using an integrated graphics card? They might have problems rendering those projection textures. Just tested on my GeForce 610M, it worked just fine:
https://www.dropbox.com/s/e7v6eki3hlxv8xw/test1.jpg

But after I switched to my Intel HD 4000:
https://www.dropbox.com/s/nqph7m3zokq80gs/test2.jpg

This sounds like a stupid idea, but...why don't you invert the colors of the projection textures using an image editor, then in the game you throw some graphics checking functions, then decide to use the original projected texture or use the inverted one..That should solve the problem with integrated cards.