It captures the 30 FPS output and inserts "generated" frames between them to create the illusion of 60 FPS.

This mod for Red Alert 3 provides an integrated 60 FPS patch along with gameplay balances and a custom launcher. You can find it on ModDB .

Enables 60 FPS with normal game speed, includes a camera zoom height limit remover, and provides widescreen support.

The is currently the most robust method for achieving a true 60 FPS experience in Red Alert 3 and other SAGE engine games. Unlike a standard mod, it acts as an engine extender that decouples the visual frame rate from the game's logic ticks.