Vray MultiSubTex Loader
Here's a simple utility to automate loading a folder of bitmaps into the vray multi sub tex map. At the minute you choose a slot in your material editor (old type is the only one I've checked and use) and then run this script. A window will appear letting you set options for mirroring and rotating textures at set degrees so it should work nicely for tiles and floor beams. There's some options for the vray hdri loader which it'll use for it's bitmaps and also the option to nest each bitmap within a colour correction map and add in some random brightness, hue and saturation changes. The colour options are percent based so if you set a value of ten, you're going to get variation anywhere between minus ten and plus ten of the colour value you've chosen.
Only a start, let me know if you've any issues or requests.
Next version I'll try and do something where you can load a single map and get the script to randomly generate a chosen amount of variations of it using the selected colour or mapping options.