I am trying to upload odoo theme application to odoo/themes. I specified the two image files into my manifest file : 

'images': [
'static/description/horizontal_theme_poster.png',
'static/description/landscape_screenshot.jpg',
],

• "horizontal_theme_poster.png" is of size 360x460 and "landscape_screenshot.jpg" is of size 556x278.
  After uploading the app, "landscape_screenshot.jpg" is shown on both - App List Image and Banner Image.
  On App list Image is cropped to match app list image default size but its not loading the image that we I specifically wanted to load for.