If you've intentionally edited your photo to be dark and atmospheric, use a caption that leans into the "dark aesthetic."
If your photo looks normal in your gallery but turns dark when you try to post it to Instagram, you might be hitting a common HDR bug. Dark image
Many users on Reddit suggest taking a screenshot of the photo and posting that instead to avoid file-type conversion issues. 4. Creating Dark Images from Prompts If you've intentionally edited your photo to be