Glossy hard pads mess with older sensors, but newer ones don't care.

Yes, the gloss level matters — but mostly for older sensors like the PixArt 3360. Newer generation sensors (3395, 3950, etc.) handle glossy surfaces far better.

The 3360 was a great sensor, but its surface compatibility was never perfect. On a glossy hard plastic pad, the lens can get confused by reflections, causing tracking skips or jitter. It prefers a matte, textured surface. Newer sensors have improved lens designs, more processing power, and better surface calibration. They simply ignore the shine. So if you’re running a 3360, matte pad is safer. With a modern sensor, you can use whatever glossy plastic monstrosity you like.

Gloss is about the only variable that still trips up an otherwise good sensor. If your aim feels floaty on a shiny pad, try a matte one first.