There could be various reasons for the problem you see here. The most obvious is that you didn't use UNC paths when you added your textures when making materials. Distributed Rendering does not like mapped networque drives. So in 3ds Max go to "Asset Tracking". As you get to "Asset Tracking" differently depending on which versión of Max you're running, please refer to Max help on how to find it. In "Asset Tracking" you can see the paths of all your bitmaps used in the scene. Currently you have something like "C:\Textures\TimberFloor.jpg". To resolve this you can just make a "Textures" folder on each render slave and copy the "TimberFloor.jpg" file into it. For obvious reasons this is not the way to do it and you will be copying till you're blue in the face. The other alternative is that you have a mapped networque drive and the texture for the floor is referenced as "Z:\Textures\TimberFloor.jpg". Again this is not UNC and V-Ray won't like it. The correct way to use UNC paths is like so: "\\MainPC1\Textures\TimberFloor.jpg". In "Asset Tracking" right-clik on the wrong bitmap path then from the menú that comes up select "Set Path" and set the correct UNC networque path.