>>5371183Png has two shaders. The light shader which is active when the thumbnail is unopened and the dark shader which is active when the thumbnail is opened. You can modify the image in certain ways to make the image in the light shader significantly different in the dark shader.
>>5371210If you save the opened thumbnail it will save the image. It will show the dark image when you post it and it will show the light image when you open it. My computer shows the first image when it is idle and the second when it is open but things can be different
