Time to texture your objects, no better way to do it than going Real Time! thanks to GLSL, now you can mix textures and materials, use stencils or different diffuse/specular shaders, whatever!
This video explains how to mix a ground texture with grass, using a stencil map.
Download the original video (1024×768px) at vimeo, link is provided on the vimeo site (registered users), if you already have it, feel free to upload it somewhere and share the link with us.
Videotutorial: Texture Splatting in Real Time