HDRI horizon reflections

[nwiz]

Hello guys,

When rendering animations with glass, one challenge I often face is avoiding the horizon line of the HDRI showing up in the glass reflections, especially when I plan to replace the background with a backplate in post-production. I save the shots in png with alpha channel.

Sometimes, I render the animation twice (once with glass and once without) and then mix the results in post. While this works, it’s a bit of a hassle. Other times, I place a box behind the glass to block the HDRI reflections, but I’m not a big fan of this method either because it gives me less control over the color and overall look of the backplate.

What techniques or workflows do you use to tackle this issue?

 I’d love to hear your tips.

Thank you!

[romullus]

Maybe try global refraction/reflection overrides, or if you need it only for specific material, you can use overrides in that material, so anything else in the scene won't be affected.

[nwiz]

Thank you for your message!
Any clue on how can I use the override only in that material? I used to override the entire scene with blacks so I can render region only the glasses but what you are suggesting would be awesome.

[dj_buckley]

Here

[nwiz]

Thank you!

[piotrus3333]

wouldn't it be easier to photoshop the environment map? just blend the sky part you need with the bottom part of some other map.