I’m using Maya and sketch up can photos be used for commercial textures or not if not is their any free website am trying to make a zombie game
Yes, photos have been used for years.
In fact that’s the standard way to create textures.
Even the original DOOM used some images.
Of course you could always hand paint textures as well, but that’s not need.
Check here for images, that way you don’t need to take them yourself…
://www.cgtextures/
Do you understand different maps for textures (normal, specular) and baking?
~ Jason
Here are some useful hints when you like to create your own textures 
- here is another good site: ://freestocktextures/