Quote: "my problem is when i turn the alpha 50% black is that everything is too bright at zero ambience. "
Alpha in the Specular Map _S needs to be black and 50%
Transparent.. Not 50% Black...
50% Black makes the Alpha a gray color which causes the Specular Map to be lit in zero Ambiance.
Quote: "How do you make something shiny but only where there is light not throughout the whole level?"
To make things Shiny or less Shiny You need to adjust the brightness of the Gray Scale part of your Specular Map.
Make the gray scale channels lighter makes it shine more... making it darker makes it shine less.
Quote: "I've been looking at how to do this (I'm not too good with graphics). I am using crazy bump, Is there a way in this program to change its alpha or do I need to take it into photoshop? if I need to use photoshop oe paint.net how can I change its alpha in there? I have tried transparency but the walls dissapear altogether even at just 50%."
It is best to use PhotoShop for Textures it makes it the easiest to edit/add Alpha Channels..
Alpha channels can be added/edited to an image by clicking the channels tab (It is locates in the bottom right corner .... Same area as the layers are displayed)...
Once on the Channels tab choose the Alpha Channel (if it does not exist click the add channel button at the bottom)... now right click and choose properties... make sure it black and 50% Transparent then click apply.
This makes ONLY the Alpha Black and 50% transparent and not the RGB channels they stay 100% opaque..
The Reason youe walls disappear is cause you made all channels transparent and not just the Alpha
Hope this Helps..
Squalker