Many of today's NFT's are made using computer programs. I go through every single one of them. You can even use these programs to make your own NFT's for free. The first one is Lunapic.com its easy to use and has so many features, you can make moving pictures also called (GIF) and the best part is you dont need graphic design experience, the program does it all for you. The next on is called giventofly.github.io and with these programs you can turn your pictures into video game like images. It will pixelate your image and you can choose which colors you want to stand out more. Another great program is Pixlr.com which can be used to create Postcards/Invitations or Business type images and would highly recommend it when adding text to an image. Last but not least if you dont want your image to be used without your consent you can place a watermark on it to prevent that from happening using iloveimg.com.