Patches that read back to the CPU (such as Image Pixel) get all black values. This is a subtle issue due to how the screen capture process works. There is a fix however, put an default “Core Image Filter” patch in between your problematic patch and the screen capture. The default “Core Image Filter” code suffices. You can also remove the color input and math (see below). This is effectively creating a ‘copy’ of your screen captured image, but this allows non functioning patches to work.