I'm working on animating a logo that was created for me in photoshop which is just some text and two different colors that cut across the text simulating light. In animating the logo I decided to place two lights which I would toggle on during the animation. However, as expected, light blends colors and in this case red and white light make pink. Is it possible to not allow the light to blend or is there a better way to approach this?
Ok, so this is going to be pretty extensive and difficult to explain through text and images but I'll do my best.
Make sure you're in cycles render
(you can then modify how close the camera is to the text with g and then z, or using the axis arrows).
Move to the second layer and create 3 planes (one will be the red light, white light and colour of the text) Make sure that these three planes are spaced out along the z-axis to ensure that they aren't intersecting. From here, enter edit mode and manipulate the vertices to match the shape you're trying to create for the lights.
Select one of the planes that is representing a light, select the object settings and under
Cycles Settings deselect
diffuse. Do this for both planes representing lights.
(The emission colour will effect the text's colour)
This is pretty much the final result, now all you need to do is animate the colour ramps to emulate the lights, crank the white value closer to the black and that will remove your issue of the colours blending.
Hope this helps and resolved your issue, sorry if any of this is hard to understand. If so, just let me know and I'll do my best to reiterate what I was trying to say. I will also attach the .blend file so that you can dissect what I did if you get stuck.