Glare of glass

[Methew5]

Hi.
I want to implement a material like glass with glare.
Manipulations with roughness and reflection doesn't not suit my needs.
When I set roughness to 0, I have a reflection, but with a standard texture (figure below). It looks really strange :)
I think I need to replace this texture for a more realistic result, but I have no idea how to implement this.
Maybe there is an easier way to implement such material?

[Methew5]

@ThomasGorisse
Maybe there is a way to make the material completely transparent, but leave the reflection effect using SceneForm or .mat files?

[Methew5]

I want to archieve glare of glass effect like this but using flat model, or like this
It is so sad to realize that this cannot be done by standard instruments :(

[Methew5]

When I set vertices' normals to Vector3.back(), then extra light disappears.
It looks like kludge, but actually works for me :)

[romainguy]

@ThomasGorisse Note that if you don't use a glTF file you can use alpha directly. glTF's alpha uses Filament's FADE blend mode, but that's not the default;

[romainguy]

Fade vs regular blend affects how the shader works, so no there's no runtime toggle. You need to swap the material.

[romainguy]

I don't understand, what does the blend mode have to do with this? My point was simply that glTF kind of messed up the concept of alpha. According to the glTF spec, when you set alpha to 0.5, both the diffuse and specular components are semi-transparent, which is obviously not how glass, etc. behaves. It's what Filament's fade mode replicates. Filament's transparent blend mode on the other hand applies alpha to the diffuse component only and leaves the specular component as-is. To do the same with glTF you have to use the transmission extension which is much, much more expensive (but allows to create rough transmission).

Not sure what the problem is on Pixel 4 but it's probably unrelated. You should at the very least see the camera stream correctly.