PSA: downloading from tumblr
TL;DR if you're saving images from tumblr, change "1280" to "raw" in the url first!
If you're like me, you care about having the highest quality images (and if you're not like me, shame on you).
Tumblr is stupid and frustrating in that it resizes everything that's uploaded to it. If the filename ends in _540.png or _1280.png then you've saved a smaller, resized version instead of the original image, and that's bad. Most image downloaders are going to grab the 1280 version, because that was thought to be the biggest one available. But it turns out you can obtain the raw, unresized image by replacing the 1280 with "raw" in the filename.
Here's an example. Let's take a post from Zko's blog (nsfw, obviously):
lewd-zko.tumblr.com/post/...et-flash-hypnosis-attract
If you were to save that image, you'd probably get it from this url (open the image in a new tab to be sure):
68.media.tumblr.com/14e48...ntftj2Y1ufsny6o1_1280.png
That's a much smaller version than the original. The one on the hub, uploaded by Zko himself, is 2400x1513, while that one is only 1280x807.
Replace that _1280.png with _raw.png however, and you get:
68.media.tumblr.com/14e48...cntftj2Y1ufsny6o1_raw.png
Which is the original 2400x1513 file, in all its lewd glory!
Please tell all of your friends about this. Don't link to 1280 urls, and don't save them, either. If you've uploaded a _1280 version of the image in the past, do us all a favor and replace it with the raw version. Together, we can keep our boorus as high-resolution as possible.