While watching one of the many unity3d tutorials out there, one spoke of Filter Forge. This is a Photoshop plugin but can be used Stand Alone as well. IT works on both Mac and Windows. Though initially the price seems quite steep ($400,-), you’ll figure very soon that it’s worths it money as it comes with a texture library of around 8000 different textures.
The great thing about his program is that the textures are all procedurally created and thus have a lot of settings you can tweak with. This way you can change the color, details, bumpiness and a whole slew of other things 🙂 After generating your texture you can then let Filter Forge generate Normal Maps , Bump Maps, Hight Maps, Light Maps etc etc of the texture you generated. Import those into unity and create your materials from them with all the options you’ll need.
As you can imagine this gives you a huge boost in graphics and making you game look awesome 🙂 Also at the time of this writing ( 19 July 2010) they are having a 50% discount ! So go for it !
Code Noctis 