Adding Wrinkles to Clothes for BGE

So I’m currently taking a break from developing my game, and I decided to go back to designing. I’ve been designing clothes, the topology, and texturing aren’t the major problems.

As the title implies, I’m having troubles adding wrinkles to my clothes (pants to be specific). I’ve searched all over the internet, but couldn’t arrive at a conclusion. I’ve tried sculping, but my pants are mid-poly, only containing 549 vertices. At this point, I’ve decided to ask the Blender Artist Community for any tips.

I might just keep all my questions regarding wrinkles on clothing here. Any help or tips would be useful, thank you.