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I have a strange issue with a shader that only uses one point light. I noticed if my app has more than one light else where in the scene the above issue in the video occurs as if it's having a hard
time selecting which light to use or stick with. Though in the shader callback I tell Irrlicht to use
I don't think it's the shader, Irrlicht will update the list of dynamic lights every frame based on which light picking strategy is used. If you want to stick with one light you can maybe just get the position from the ILightSceneNode instead.
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Yeah I already knew it was a Irrlicht side problem. I'm not sure why people always say it's a shader problem. If I only have one light in the scene the shader works as expected.