Image types able to display in C#

I have a fading script that works perfectly but it fades the images I placed as black images. Both do not show. They are just black. They are both JPEGs. I am wondering if there is a specific image type that C# prefers to display or if it doesn’t matter.

Unity doesn’t care about your original image types once imported. As long as they show up correctly in the inspector, your problem isn’t about image types, but more probable about some scripting error.