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How to get light to affect the foreground of black text

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Ben McCormack
How to get light to affect the foreground of black text
on Jun 14, 2013 at 3:14:38 pm

I'm trying to add a light to a scene that has black text on a white background. My goal is to keep the light in position and slide in the text. As the text slides, part of the text will be less black because of the light.

I've added a light and positioned it correctly. I've also made sure my text is 3D-enabled and has "accepts lights" on.

The problem I'm having is that no matter how I position the light or tweak the material options, I can't figure out what to do so that the surface of the text changes intensity with the light that's being cast. The text will cast shadows (when turned on), but the surface won't change.

What do I need to do to get the surface of the text to change color (to grey or white) based on the light source?

See attached images for what I've got so far:




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Walter Soyka
Re: How to get light to affect the foreground of black text
on Jun 14, 2013 at 4:02:49 pm

[Ben McCormack] "I'm trying to add a light to a scene that has black text on a white background. My goal is to keep the light in position and slide in the text. As the text slides, part of the text will be less black because of the light."

Two options:

1) Make the text not black. Black absorbs all light. Make it gray or even white so it responds to light, and let it fall to black when there is no light hitting it.

2) Keep it black and pump up the specularity to get bright highlights. Get the metal slider down from 100% and adjust Specular Intensity and Specular Shininess to taste.

Walter Soyka
Principal & Designer at Keen Live
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Ben McCormack
Re: How to get light to affect the foreground of black text
on Jun 14, 2013 at 4:45:45 pm

Thanks Walter! Changing the text to white and adding an ambient light to darken the scene helped. It ended up being not quite what I wanted, but it was good to learn how it's done.


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Darby Edelen
Re: How to get light to affect the foreground of black text
on Jun 14, 2013 at 5:17:02 pm

[Ben McCormack] "Thanks Walter! Changing the text to white and adding an ambient light to darken the scene helped. It ended up being not quite what I wanted, but it was good to learn how it's done."

From what you describe you should set the text's color to the intensity you want to see when it has light shining on it.

First I'd recommend setting the Diffuse material option to 100% then if you want your text to appear 5% bright simply set the brightness of the text to 5%. No need for an ambient light (that can confuse things later if you add more 3D layers).

Darby Edelen


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