Physically accurate glow, glare, blom, halo, Flare and so on !

[Dariusz Makowski (Dadal)]

Heya

Was wondering will that be possible, at some time in future?


I think that it ads a lot to the realism to image. Specially in cars and lights. Most of the time we get pure reflection of light (White plane and so on) when in reality that would never happen. The post work of adding glow is not so effective since its not affecting the reflections and so on.... We also control the image globally instead of locally making it even more unrealistic...

A fully physically accurate render engine would be great !

[Da_elf]

doesnt vray 2.0 do that?

[Dariusz Makowski (Dadal)]

No. Only adds a bad (in my opinion) dispersion...

[simmsimaging]

The lens effects in 2.0 have nothing to do with dispersion and, from what I understand, are about as accurate as you can get without actual physical optics etc.

They affect reflections just fine, AFAIK it's just a matter of brightness really so it doesn't matter if it's a direct glimpse of a light source or its reflection.

[LarsSonparsson]

Few examples showing how bloom works.
It's mostly happening in the lens. Thats why its not reflected.
See the image with car red backlights.
If there is a bloom in reflections, then the reflection itself is bright enough to bloom.

[yyk]

Honestly, there are far more important things the developers can focus on rather than stuff like bloom and glare.

[LarsSonparsson]

Honestly, there are far more important things the developers can focus on rather than stuff like bloom and glare.

I totally agree and also believe that the focus is still on a renderer itself.

[glorybound]

Have you looked at the glare application?

[Dariusz Makowski (Dadal)]

Humh, I didnt see it b4, will have a closer look, so far it looks like another render engine... I like the effect tho !

[BBB3]

I don't think it's available any longer. All the links to it have been taken down.

[glorybound]

I have a copy, but to tell you the truth, I have never been able to use it successfully.

[dmf-123]

You know how we can photograph a grid and then generate a distortion profile for a particular lens / camera at a particular focal length, that can be used at render time to generate a similar distortion...?

Is there any analogous way to calculate the bloom and glare from an actual physical lens, and use that to create a profile that can be used during rendering..?

I'm not sure how that could be done; just brainstorming...

[vlado]

Yep, it can be done... the trick is that the bloom/glare is slightly different at different parts of the image relative to its center. But, ignoring that, you can take a picture of a piece of thick cardboard with a small hole in the center in front of a very bright light source, and use that as your glare bitmap.

Best regards,
Vlado

[dmf-123]

Awesome. Can't wait to try.