High Dynamic Range, or HDR, is a process that allows you to increase the range of tones in an image, giving you more flexibility when it comes to editing. In Photoshop CC, there are two ways to HDR: Merge to HDR Pro and 32-bit HDR.
Merge to HDR Pro is the more traditional way of doing things, and it’s great for getting a high quality result. However, it does have its limitations. For one, it can only be used with RAW files – so if you’re working with JPEGs or TIFFs, you’ll need to use the 32-bit HDR option.
The 32-bit HDR option is newer and was introduced in Photoshop CC 2015.5. It doesn’t have the same quality as Merge to HDR Pro, but it is more flexible – you can use it with any type of file, not just RAW files.
So, how do you HDR in Photoshop CC? If you’re working with RAW files, go for Merge to HDR Pro. If you’re working with JPEGs or TIFFs, go for 32-bit HDR.