Align the whiskers along the same vertical axis that the cat’s eyes line up on. Draw a thin line from the center of the nose to the tip of the tail—that’s your reference. Place each whisker at equal angular offsets from that line; if you start at 15°, then the next is 30°, etc. Make sure the length on the left equals the length on the right, and keep the curvature the same. A quick check: put a ruler on the grid and measure both sides—if the numbers match, you’re symmetrical.