Actually it makes all the difference with normals in a 3d game engine. I play with 3drad a lot and I determined you have to do is make sure in the scene properties that all poly's are doublesided (instead of smart). That way they will display correclty in a video game engine. Most engines are smart enough that they wont render the outside ones b/c you cant see them (lod algarithms and what not), but it does make the files bigger. Whats really cool is using carrara terrian generator..convert it to the VM...reduce poly's..apply texture..drag and drop on some obsticals...export..instant 3d scenery. Carrara will be awesome for amatuer 3d game makers when it gets some animation capabilites and .X support. ok..you can tell its time to go home..my grammer/sentence structure is worse then ever :)