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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Infra red problem with clothes

I think it's with man-made materials (like Nylon) where the problem presents itself most - particularly noticeable on black materials - they go a weird magenta colour like the above pictures show. I remember filming something years ago with Police uniforms that went magenta in strong sunlight with normal ND's - obviously it looked particularly weird because, as everyone knows, the police wear black not magenta!!
 
sorry about the misfortune. if you really can't reshoot, i can fix that for you. send me a PM if that's the case.
 
I wonder if the fixed scarlet will have IR + ND filters built in or will we need an external IR filter?
 
i think they are built in. i know there are 2 ND's built in, at least, and i'm pretty sure an IR as well, it would make sense.
 
Sorry for my late reply but I wasn`t in office yesterday.
I saw it on the shooting but in the EVF it didn`t look sad like now.
We hadn´t much time and no IR filter on location.
It was a M sensor, no MX.
 
Hm...

IR pollution is happening on and off at different situations. For that reason some put in an IR filter and stick with it. I don't like that approach, as it kills of nuances in skintones etc quite a lot.

I do prefer a IR cut in front of regular ND's, as you cannot stack the combo filters with anything without getting issues. Even a pola, not to mention a grad can give issues when stacked behind an IR/ND combo. And if you have to stack a 1.2 and .6, you are into real trouble with the combo filters.

After a short period of love, they're now permanently off any production I work on.

The IR cuts, work well with stacked filters, though.

I am a big fan of them, when we see we need them. In your example, that is a rather obvious need...


Cheers

G
 
Marco,
I agree with Mike & Randell on this.The first screen shot has it's problems with polyester, Randell is correct. it refracts the light. I've seen it also myself but did correct it with an IR. The second screen shot has a lot of IR in it but its not so obvious due to a wider angle lens. BTW? What lenses were you shooting with? The lenses look like Nikon possibly or the RED 18-50. Some lenses are not color balance the same so they will react differently FYI. It's just my thoughts that this is a R1 non MX? Sorry to say Marco that it seems like your stuck with the images. We all learn the hard way sometimes. Good Luck!
 
paulherrin said:
sorry about the misfortune. if you really can't reshoot, i can fix that for you. send me a PM if that's the case.
Click to expand...

Paul,

If you wind up doing this, can you post the results? I would love to see it.

BTW, like was mentioned before, in some spots her skin tone matches the fabric tone, so a using a color based key only isn't going to do it. I imagine it means rotoscoping her out first.

That's very nice of you to offer and I'd love to see the results.
 
Marco Jahn said:
Sorry for my late reply but I wasn`t in office yesterday.
I saw it on the shooting but in the EVF it didn`t look sad like now.
We hadn´t much time and no IR filter on location.
It was a M sensor, no MX.
Click to expand...

M is more sensitive to IR than MX. So this is not surprising to see.
 
If she's just sitting still you could roto the seated shot. The good news is the fabric fuzz is creating a bad fringe anyway... so you have a bit of room for slop without making it look *more* like a VFX shot.

Might even be a good test for the CS5 auto-roto tool which works 1/10th of the time.
 
Peter Moretti said:
Paul,

If you wind up doing this, can you post the results? I would love to see it.

BTW, like was mentioned before, in some spots her skin tone matches the fabric tone, so a using a color based key only isn't going to do it. I imagine it means rotoscoping her out first.

That's very nice of you to offer and I'd love to see the results.
Click to expand...

i'll let the owner of the shots do that. but, it will be like it never happened.

i'll be using a combination of different keying strategies, spill suppression, and rotoscoping to generate mattes for isolated color corrections. straightforward, tedious stuff. i wouldn't recommend shooting without proper IR filtering if at all avoidable. but these things do happen.
 
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