I guess my most recent comment about this was deleted.

When designing a poster I tried to import a picture from Unsplash directly. Unfortunately the images imported from Unsplash are compressed. After I exported it to a PDF it didn't give me 300DPI but only 33DPI.

I tried downloading the same image from Unsplash's website and uploaded the image into the design editor. I got an error saying the image was too low in resolution which wasn't true. I removed the restriction in settings and tried again uploading the image. The image I uploaded finally had the right size, also when i exported the image to a PDF file.

Please consider fixing the Unsplash images feature. It should be simple enough to pull the original images from Unsplash into the design editor and not a compressed image that would look terrible on a printed poster.