Do you mean for the "
Latest Updates" pages here on F95?
This being what is shown today.
I don't know if thumbnails are generated using the game's cover image or not. Some looks like they are, but since I've never uploaded a game - I'm not sure.
According to the
Game Uploading Rules, the only restriction is that cover image should be a maximum of 500KB (or 5MB for an animated GIF). I don't see anything specific about the banner image.
Each banner thumbnail is roughly* 310px x 106px (which would be an aspect ratio of 155:53).
* I say "roughly" because I'm working from browser screenshots and manually dragging sizing boxes around things. My aim or my eyesight could be slightly off.
Taking two games at random, Kronos Time Titan and Dawn of Malice, these are their cover images:
Kronos Time Titan (1920 x 480 @ 329KB - ratio 4:1).
Dawn of Malice (1280 x 720 @ 196KB - ratio 16:9).
As you can see, neither really have an aspect ratio that matches the generated banner thumbnail, but the Dawn of Malice image is probably the easier of the two to explain (assuming the F95 is using some automated tool)...
The cover image is resized to be roughly 310px wide. But the resulting image is too tall. The resizing tool aligns itself along the center line of the image and crops it above and below that center line in order to create an image of the correct dimensions.
Now it could be the author uploaded a cover image and a banner image separately. Or it could be that the banner thumbnail was generated by resizing the cover image. Checking a few games with animated banner images, the first image (presumably the cover image) of the thread is also animated... leading me to think it's an automated tool.
I somewhat doubt it could crop a GIF file at top/bottom though. Whatever the tool is, it's capable of cropping GIFs too. (See:
Ice Maze).
4:1 is certainly a good starting point, with images of 1920x480 ,1600x400 or 1200x300 being reasonable examples.
Though if you want to stick to the 310x106 guideline I mentioned earlier... perhaps 1920x660, 1400x480 or 1280x440 are sizes to aim for. Though personally, I think I'd aim for a 1920x1080 cover image - with special attention to the 1920x660 middle part of the image that could end up being the thumbnail when it is cropped.
Edit:
It seems the banner is something entirely separate from what I've been describing and is unused by most games on the recent updates list.
Where a banner has been added for the game, it is shown as a 1200x300 image (ratio 4:1) behind the game details.
So for a game that includes it (like What A Legend), it looks like this:
But a game that hasn't added a specific banner (like Pale Carnations), it looks like this:
So it looks like there are 3 images that you should care about, here on F95:
- The banner (ratio 4:1 ... 1200x300, 1600x400, 1920x480, 2160x540.
- The cover image (any size, but ideally at least 1280px wide). Max size 500KB (or 5MB for animated GIF).
- The thumbnail (~310x106 - generated by resizing and cropping the cover image).