I'm new to the exchange, I am going around in circles trying to get my nodes setup correctly in blender cycles. The basic setup is that I have a brick texture, which I want to overlay/mix 2 grunge textures with transparency in. However, although everything appears fine in material view, which is how I want things to appear, when rendered everything is black. I've eliminated lighting as a problem. I've read article after article on using transparent images in cycles as well as watched several youtube videos, but still my setup seems to be wrong. Maybe what I am trying to do isn't possible.
I've uploaded the blend file to my onedrive, so you can take a look at it, bare in mind I am no artist and this is a simple model for uploading to a virtual world, so it's nothing fancy and I'm still learning, so my geometry might be a little rubbish too. lol
If someone could set things up for me, I would appreciate it, then I can learn from what I see.
The blend file can be found here: https://pkamc-my.sharepoint.com/:u:/g/personal/atlockey_myoffice365_site/EQcTn5iMnZdHpNzOjup10XoBXa1WnJrgr1239vGw4osPpw?e=9KHroh