UDK materials

In UDK the environmental come more alive with animated material, this give the environment greater impact, a lot more than u can get from the screenshot. Creating the materiel which were animation, involved alot of trail and error. after create alot of these materiel i find then now more easier to understand and create.

below is the basic step by step progress of one of my materials. (car with light on and flashing warning lights.)
This was the hardness materiel to create because it has 3 different lights, main front lights (yellow) rear lights (red) and warning lights (orange).

Screen of materiel, when warning lights are on

Screenshot the whole material, The emissive channel is used to create the 3 different lights 

I used the Lerp node to achieve a masked effect on the texture i can control where the light show.

Warning light material section, i used the Lerp with the masked warning light areas plugged into the alpha channel. The A channel had a Constance of 0 so it didn't effect the texture. The B channel has a multiply node which splits the warning lights flash timing and the colour of the lights.

This is the main and rear light section of the material. the first Lerp nodes A channel is connected to a Add which is then connected to two more Lerp nodes. This configuration help me achieve the look i was after.