Moire? Help please!

[Monique Graham]

Hi Damien,

Recently started shooting with the R6 and editing this session I've noticed this coloured Moire on the client's clothing.  I have read your article and I can still see it in the raw file at 100%.

Please see 100% crop

Thanks,
Monique

[Damien Symonds]

Hi Monique, I think this will work for you ...

A Channel Mixer adjustment layer, with these values:

• Red 0, +101, 0, -2
• Green 0, +97, 0, +1
• Blue 0, +95, 0, -2

Make sure you get the numbers in exactly the right order.

[Monique Graham]

Thanks for the reply Damien.  Not sure I'm doing it right, it just made it all monochrome.   

So I open the photo in Photoshop, create new channel mixer adjustment layer, then go to the red channel and adjust to the values R +101, G 0, B -2, the go to green channel and put in those values you listed and so on?  

[Damien Symonds]

That's correct.  And it will make the whole image the same greeny-grey colour as the shirt.

Then, of course, you mask it to the shirt only.

[Monique Graham]

Ok, got you.  When I mask it onto the shirt it comes up even more distorted

[Damien Symonds]

That's because you got the order of the numbers wrong

[Monique Graham]

Will try again...so when you say 

• Red 0, +101, 0, -2

What does the 0 directly after the Red mean?  Can't see where I need to input that zero?  Sorry if that's a silly question!

[Damien Symonds]

Ah, I see the problem.  Your Properties panel is too small, so you can't see the fourth field.

I've given you four numbers, which you have to put in the four fields, in the order given.  0 in the first field.

[Monique Graham]

Success!! You are a legend!! Thank you so much! 

I  have a similar problem with mum who was wearing a blue dress.  Will this number combination work for different colours or will I  need a new set of numbers to apply to her dress?

 

[Damien Symonds]

A blue dress will require different numbers.  Let's see it.

[Monique Graham]

[Monique Graham]

Same dress, different photo.

Do you know why this is this happening?  Will I need to be dealing with this often?

Thanks again for your help!

[Damien Symonds]

For this one, it should be sufficient to add a Solid Color layer of appropriate blue colour, and set that layer's blend mode to "Color", then gently mask it on to the problem areas.

1 hour ago, Monique Graham said:

Do you know why this is this happening?  Will I need to be dealing with this often?

You're having a run of bad luck.  Fine detail like clothing fabric makes it happen.

[Monique Graham]

Will give that a go.  Thanks Damien!