A trio of my Op-Art pictures for this Inktober night. i have a bunch of my Op-art stuff at my dA gallery, but some folks don't like going to dA, so .... and this pic isn't even posted to dA yet.

And, no, there aren't actually over 1000 pictures in the 'Gear Twist' series ; on the picture i did just before this one i forgot if it was picture 5 or 6 - so i just named the file 'Gear Twist 1000' - and since this was the next picture ....

From July '16. Again i don't recall if i made this with PaintshopPro7 or with Krita or both.