This is a flawed perspective grid I created for the purpose of designing backgrounds. I can't use it because the conformity is wrong but I figured that it could work as an art piece unto itself. Yes, it was created in Flash, here's a link to the SWF:
https://www.newgrounds.com/dump/item/686ccb8fefedf35369250f74bae8e45b
You are free to copy, distribute and transmit this work under the following conditions: