Regenerating Images for Galleries
Sunshine generates the necessary sizes of an image and applies any watermark at the time an image is uploaded. If you have changed any of your image size or watermark settings you will need to regenerate the images from the original upload file.
Sunshine has a built-in tool for regenerating images for all Sunshine galleries. Go to Sunshine > Tools > Regenerate Images. This will remove any unnecessary image files and recreate all the required ones for images in all your Sunshine galleries.
You can regenerate images for one specific gallery by going to Sunshine > Galleries > [hover over gallery name] > Regenerate Images.
Note: Our built-in regenerate tool does not yet work with WP Offload Media. Please use the Regenerate Thumbnails plugin instead.