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Question by Guma178 · Apr 06, 2019 at 03:21 PM · shadergraphicsskybox

Alpha channel support for Skybox/Cubemap shader

Hi. Im zero in shaders. Although I have question about it. Is it possible to modify the Skybox / Cubemap shader to support alpha channel or it's impossible cause it has foundation tag "Queue"="Background"?It will be wonderful if you make hint how to do this.

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avatar image Glurth · Apr 06, 2019 at 03:30 PM 0
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interesting question. What would you expect to show up "behind" it, e.g. what would the transparency make visible? If the answer is: just another background texture, you could combine the alpha containing texture, and the "actual" background texture yourself, THEN apply it to the material.

Of course, if you want to say.. rotate one and not the other, that wouldn't work.

avatar image Guma178 Glurth · Apr 06, 2019 at 05:00 PM 0
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Unfortunately it's not a solution. Thanks for reply anyway.

avatar image RobAnthem · Apr 06, 2019 at 04:51 PM 0
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The answer is, this is not possible because as Glurth pointed out, there isn't anything "past the skybox" Unless your shader handles a secondary texture rendered "behind" the main texture. What I think you want is an inverted sphere with a cubemap texture that supports alpha channel. However, it wouldn't give you an infinite skybox, but it's the only way to make objects beyond the skybox.

avatar image Guma178 RobAnthem · Apr 06, 2019 at 05:01 PM 0
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I planning render other skybox under transparent skybox

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