“What are recommended image sizes for theme?”This question applies to Division - Fullscreen Portfolio Photography Theme
In order to create proper thumbnails for galleries please use following image sizes:
Please use as big images as possible - don't worry it will be scaled by theme and proper thumbs will be generated for portfolio, gallery, quick gallery and blog so Your site will load fast.
For instance If You want to create fullwidth portfolio entry like this one:
Please use big images e.g 1920px x 1080px to make You sinlge portfolio look sharp on big HD screens. Theme will create smaller thumbs from this big image for portfolio gallery page.