Cannot open 3 channel png image

Hi Tom, I hope all is well. I'm seeing the following error on Windows 11 when trying to open rgb pngs that were created from rgb exr images: `ImageData::orientToTopLeft: only strides 1 and 4 are supported.` I guess libpng is expecting an alpha channel? I've attached an image for you to test with in case it's an issue that needs resolving. <img width="512" height="512" alt="Image" src="https://github.com/user-attachments/assets/fe83fd13-e5ee-4146-95aa-89b6551022c5" />