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Author Topic: Darker core color over-ridden by lighter fringe color even at 255 alpha  (Read 1606 times)

Avan

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This is regarding beam projectiles btw.

At an alpha of 255, a darker core color should over-ride the fringe color, resulting in a dark center with a lighter area around it, as opposed to just a flat light area color.

ie, core [0,0,0,255] and fringe [0,0,255,150] comes out looking solid dark blue, not dark blue with a black center

Alex

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The core and the fringe are additively blended to get the glow effect - not a bug.
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Avan

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So it always additively blends things? even against the background? Then what's the point of the alpha channel then?

Alex

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The rgb values are multiplied by the alpha. Think of it as a "brightness" setting for this use case, not transparency.
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