When you try to use the Pinch, Spherize, Twirl, or ZigZag distort filters on a large image in Adobe Photoshop, they are dimmed (unavailable).
Reduce the pixel dimensions of the image.
There are maximum image pixel dimensions for each of these filters:
ZigZag: 8000 x 8000
Pinch: 11500 x 11500
Spherize: 11500 x 11500
Twirl: 11500 x 11500