Hello, thanks for the quick reply.
What we need is to be able to specify just the height, and then have the CMS software scale it down and keep its proportions/aspect ratio, which for example Drupal currently does.
We do not want the thumbnails to be square, just to share the same (custom specified) height, and then be dynamically wider or narrower.
Simply keep the aspect ratio.
Your answer does not sound like this issue has been addressed.
The need is two-fold:
a) to be able to upload unaltered originals of any and many sizes and dimensions, letting the CMS deal with auto-creation of variants. We do not want to do any manual work with images, but leave it 100% to the CMS.
b) we want the thumbnails to be a smaller version of the original, not a different version. Must be exactly the same, but scaled down.
Other competitors like Galleria (also for Drupal) does this just fine by leaving it to Drupal to serve its thumbnails automatically.
This is not even a technical challenge. It just works.