Trying it out on a 16384×16384 pixel PNG that had already been AI upscaled by another AI engine it is grinding away with periodic 100% peaks on my Nvidia dedicated GPU it may take quite some time utilising only 1467.8MBytes of the 4096MBytes dedicated VRAM sadly the Vovsoft GUI does not provide progress information beyond that it’s ongoing from the open source realesrgan-ncnn-vulkan.exe AI upscale engine. took 1215.5 seconds BUT did not create the output copy of the upscaled file and did say Failed as status. Trying a smaller photo… 4096×4096 pixel PNG of same image… took 454.6 seconds and upscaled it by a factor of 4 to 16384×16384 pixels BUT the output PNG was not compressed so well so took up 261MBytes instead of 39.5MBytes the other AI upscaled 16384×16384 PNG is both use PNG-ZIP compression according to Irfanview and vovsofts output PNG did not report DPI values in Irfanview… I don’t think it will handle HDR images properly yet.