In the World tab, I choose Surface = Background.
Color = Environmental Texture and after I select the image, it treats it like a 360 Equirectangle.
I am not using a HDRI map, I am using a flat backdrop that is the same resolution as my render resolution.
I tried changing it to Image Texture and the image became very big and need to be scaled down.
I am not going to do that because I find it ridiculous that I need to “scale” an image that matches the same resolution as my rendered resolution.
I just need it as a backdrop, I did it before but I totally forgot how to do that please help thank