<html><head/><body>Hi. <br>
<br>
I was talking about the normal map's alpha channel (you mentioned bump-mapping), which doesn't affect the object's transparency. As you are using a shader, you can even control what your materials alpha is used for. So alpha would be fine to transport your value.<br>
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Anyways, you can use any material property if you're not using it for normal rendering...<br>
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And of course you can use the value to scale up and down. Simply remap the values to have for instance an 0.5 input map to a 1.0 scale output and anything below scaling down and vice versa.<br>
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If using the material property is not an option, the best next choice is a uniform per drawable. Using a floating point value gives you total control over scaling up/down whatever.<br>
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In case you have trouble how to proceed: give us some more details on what your doing, or some code/shaders to read.<br>
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Cheers <br>
Sebastian<br>
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