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I have copied this tutorial for transparent glass at 6:17 - 7:04, and for emission/light, 10:30 - 10:50.

As you can see from the following screebshots, I copied these transparent glass and emission settings from that tutorial, yet this is what came out:

Glass BSDF from one angle enter image description here Glass BSDF from another angle: enter image description here

Emission sphere settings:enter image description here

I also flipped all normals outside, for the cube and sphere. How do I view the emission shining through the glass from any angle? Thanks

File:

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  • $\begingroup$ I often have the same problem, that in some angles (in my case it seems to be that when the viewpoint is slightly below the light's origin so that you are looking up to the light) the light bulb disappears. Since it's very predictable for me I wonder if this is simply some kind of limitation of Eevee or the Alpha Blend mode in general. I prefer Cycles anyway... $\endgroup$ Commented Mar 22, 2023 at 9:25
  • $\begingroup$ Okay, I found something out - nothing to give a solution, but a kind of rule to when the sphere disappears: whenever the origin point of the sphere lies behind the origin of the cube (i.e. further away in Z depth), the sphere becomes invisible. If it is closer to your viewpoint or the camera from which you are viewing it, it reappears. If both origins are in the same location, the sphere stays completely invisible. So it seems like this really is just the way Alpha Blend in Eevee works... $\endgroup$ Commented Mar 22, 2023 at 9:41

1 Answer 1

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Your light needs to be Opaque, it is currently set to Alpha Blend, Eevee has problem to show an Alpha Blend object (or an object with Screen Space Refraction) through another Alpha Blend object:

enter image description here

See from 13:37 to 13:45, he also has transparency problems, and to fix it he mixes his Glass with a Transparent node, also I'm not sure why he makes the light bulb Alpha Blend as it is supposed to be an opaque object:

enter image description here

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  • $\begingroup$ Good answer, but in the video tutorial i mentioned, he did this: i.ibb.co/Sw0QMGb/posture.jpg, and notice here i.ibb.co/DCF2M6F/posture.jpg the engine is in Eevee? How did he make the emission here visible through the glass regardless of angle? $\endgroup$ Commented Mar 22, 2023 at 9:46
  • $\begingroup$ I've edited my answer $\endgroup$
    – moonboots
    Commented Mar 22, 2023 at 10:01
  • $\begingroup$ I see, makes sense. Sorry for a stupid question, but how did he mix his Glass with a Transparent node? When and where did he do so? $\endgroup$ Commented Mar 22, 2023 at 10:06
  • $\begingroup$ See at 14:30...... $\endgroup$
    – moonboots
    Commented Mar 22, 2023 at 10:10
  • $\begingroup$ Maybe he uses Alpha Blend in the tutorial for the light bulb, because since he didn't enable Screen Space Refraction on the glass material, his bulb is not visible unless he enables Alpha Blend there as well. Not the first time that I see a Youtube tutorial where the tutor doesn't really know what he is doing. ;) $\endgroup$ Commented Mar 22, 2023 at 10:20

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