I have a black background, and assigned 'Octane Specular' to a sphere. My assumption here is that it's entirely transparent like glass.
Yet, when I render it's entirely white.

Is this assumed behaviour? Where does the white come from?

So I'm trying to get this effect on a sphere:
https://i.imgur.com/xMzKxHY.png

With standard Octane Specular material and an OctaneSky with a basic abstract pattern on it the whole thing remains illuminated as if it's completely opaque:
https://i.imgur.com/LzAL59a.png

I realise this is quite a ...

I'm hyper aware this has been asked a number of times, but I cannot for the life of me get this of this grain in my interior shots.

Exterior with sunlight is completely crisp, but with the interiors I've:
- Emissive sampling rates 15,000
- Max samples 6,000
- GI clamp 10
- Using Pathtracing, but ...