Transparent GPUImageView?

gpuimage, ios

Solution

I found you need to set both of these to get a transparent background. Neither works alone.

strengthPreviewImageView.backgroundColor = [UIColor clearColor];
[strengthPreviewImageView setBackgroundColorRed:0 green:0 blue:0 alpha:0];

Problem

I am using a GPUImageView inside my iOS application. I want that the GPUImageView have a transparent background. I tried setBackground:[UIColor clearColor] It does not work. Any workarounds? Regards

Original source