I made these grids to help me with perspective, and I thought maybe some other people mind find them useful, so I decided to post them here! Feel free to use any of them, but it would be really cool if you let me see where you used them! :)
I'd say though, that last one is wrong. The top and bottom pieces look right, but the two on the sides aren't. What should be 'vertical' lines radiating out from the centre should all touch the borders, as the top and bottom ones do. The two on the sides are going too 'wide' at the bottom so their long lines are cut off. The one on the right in particular is overlapping the top one improperly, the corner isn't jointed like the others. It's hard to describe. :I
Normally I wouldn't nitpick, but they are for reference. :]
Oh yeesh! (That was a sound of disgust or something lol) You're right! Poop. I'll have to make a better one at some point. I've never made these before lol, but I should have noticed that really. Thanks for pointing that out!