Question

This question was asked before but the solutions did not work on my side.

My png for a simple ball looks like this:

I saved it without the white bg and with a transparent bg.

Why is the white showing up in the corners?

Answer 1

Check how your are initializing your EAGLView. To support alpha transparency you should use a pixelFormat like kEAGLColorFormatRGBA8. Your code could look like:

EAGLView* glView = [EAGLView viewWithFrame:[window bounds]
                               pixelFormat:kEAGLColorFormatRGBA8
                               depthFormat:GL_DEPTH_COMPONENT16_OES
                        preserveBackbuffer:NO
                                sharegroup:nil
                             multiSampling:NO
                           numberOfSamples:0];

You could try and use this png file instead of your own just to check if it might be a problem related to the png: