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Question by Rytif · Jan 09, 2014 at 01:26 AM · shaderreflectionshine

How to do a Bejeweled Gem Shine Effect?

When the gems are idle in a game of Bejeweled they like to do a shine (or reflect?) effect. Is that something that must be animated on the art side or is it possible to use a shader to generate this effect?

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avatar image Rytif · Jan 09, 2014 at 05:23 PM 1
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Yep, it's a sprite and I think you're absolutely right. Just following this YouTube video on Photoshop (I'm not an artist!) I was able to get an effect that I'm happy with.

Thanks for the info about the 3D model side too. I was thinking of trying it if this didn't look right.

You can repost this as an answer.

avatar image Invertex · Jan 09, 2014 at 09:49 PM 0
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Cheers, done :) Hope it goes well for ya!

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Answer by Invertex · Jan 09, 2014 at 01:35 AM

If you're using sprites, then it should be done on the art side, and merely have your script for the jewel trigger the shine animation after delta.time has reached a certain threshold, and reset the counter when that happens or if it's interacted with.

If it's a 3D model, then you could use a shader that has specular and merely increase it's value like you would trigger an animation in the previous method. Though this effect wouldn't look that great unless you had a good enough model and lighting setup, preferably an environment map for the shader. All depends on the look you're going for.

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avatar image clunk47 · Jan 09, 2014 at 11:56 PM 2
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+1. I'd like to add on to this answer, you could also use a particle system w/ a sparkle material and proper settings for a shimmering effect.

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