frosted glass texture 3d model

Create a realistic frosted glass rain overlay texture. Only the glass surface effects should be visible. Include semi-transparent matte frost blur patches, condensation, soft cloudy diffusion, and realistic rain droplets with thin vertical streaks flowing downward. No background, no sky, no scene, no colors behind it. The image must have a fully transparent background with only droplets and frost visible. Clean alpha channel, PNG transparency. Photorealistic, cinematic lighting, high detail, seamless, 4K resolution, suitable as a Unity UI or shader overlay.