Multiply mode in SpriteBatch

Posted by ashes999 on Game Development See other posts from Game Development or by ashes999
Published on 2012-12-16T13:02:55Z Indexed on 2012/12/16 23:22 UTC
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XNA

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lighting

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monogame

I have a "lighting" texture (black background with white or colours for lights) that I want to draw as a multiplcation operation. SpriteBatch.Begin can specify BlendState.Additive, but there's no BlendState.Multiplicative.

I also tried the solution in this answer, but it didn't work -- even when I (incorrectly?) changed the code to work with XNA 4 style ColorDestinationBlend, I ended up with the final solution being inverted (black area where the light is, everything else is visible).

I initially thought of a shader, but I couldn't get shaders to work with MonoGame, so I'm falling back to SpriteBatch.

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