Hi all,
I have been scratching my head whole day and I can´t find a proper solution for this, let me try to explain:
I have two layers, one is a picture of a metal roof and another layer is a white fill layer in Multiply mode (this last one is a requirement by the web master), this multiplied layer is meant to change the color of the base roof as the customer needs or by a color code, the problem is that I can´t find a way how to "color correct" the base roof in order that the multiply layer match as close as possible some color codes (reds, greens, light grey, etc).
I have right now 2 Curves layers and one Histogram correction trying to avoid the "darkening" of the roof without loosing details but honestly I feel like I reached a dead end now.
Here is a small screenshot, the dark grey roof is the one that needs to be "colored" by the white multiply layer to match the red one.
Here I made the white layer colored with the red color code in multiply mode and as you can see the roof become way to dark and there is not even close to the red roof that I need to match.
Can someone please throw me a light here?
Cheers
Juan
Non-destructive color change
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Non-destructive color change
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Re: Non-destructive color change
I'm not sure if a pure multiply thing can work perfectly enough. The glossy parts of the roof reflect the sky. Imagine a very flat look onto a glossy surface, you will only see the reflection, no matter what color the surface has.
I think I would add a layer above the multiply, containing some light sky, masked by the luminance of the original roof.
If the webmaster says that this is not possible, then I would place a curves between the roof and the multiplying layer and adjust the 3 rgb-curves to fit just this kind of red roof. But I guess the result would be stupid if you excghange the red multipling layer with another color.
I think I would add a layer above the multiply, containing some light sky, masked by the luminance of the original roof.
If the webmaster says that this is not possible, then I would place a curves between the roof and the multiplying layer and adjust the 3 rgb-curves to fit just this kind of red roof. But I guess the result would be stupid if you excghange the red multipling layer with another color.
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Re: Non-destructive color change
Can you not change the multiply blend mode to colour and then just mask the non roof areas out?
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Re: Non-destructive color change
I tried multiply, and it's a mess. The chosen red (192/64/64) is still too saturated.
I had another try with 255/128/128 and different curves. That looked better, but this color is much too different from the color of the desired roof and not useful as a color selector anymore.
I had another try with 255/128/128 and different curves. That looked better, but this color is much too different from the color of the desired roof and not useful as a color selector anymore.
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Re: Non-destructive color change
I´m not sure about been the multiply the best choice since it darken the colors.Hoogo hat geschrieben:I'm not sure if a pure multiply thing can work perfectly enough. The glossy parts of the roof reflect the sky. Imagine a very flat look onto a glossy surface, you will only see the reflection, no matter what color the surface has.
That´s a great idea, I´ll play with it.Hoogo hat geschrieben:I think I would add a layer above the multiply, containing some light sky, masked by the luminance of the original roof.
I asked him if there are technical reasons for choosing multiply, (still waiting for his answer) because I got semi/ok result using Linear dodge, but again it looks ok for red but then if the layer is light grey it looks really really bad.Hoogo hat geschrieben:If the webmaster says that this is not possible, then I would place a curves between the roof and the multiplying layer and adjust the 3 rgb-curves to fit just this kind of red roof. But I guess the result would be stupid if you excghange the red multipling layer with another color.
I hope so, like all of you noticed the multiply is not the best choise, but since he is programing the web thing not sure how that works behind the scene.Wayland hat geschrieben:Can you not change the multiply blend mode to colour and then just mask the non roof areas out?
You got a nice result in your test.
It´s really a difficult situation because we go from light grey to black passing through red and brown , the color choice is way to wide that I´m clueless about creating a "parametric" layer to get any color that the user wants to put.Hoogo hat geschrieben:I tried multiply, and it's a mess. The chosen red (192/64/64) is still too saturated.
I had another try with 255/128/128 and different curves. That looked better, but this color is much too different from the color of the desired roof and not useful as a color selector anymore.
Cheers
Juan
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Re: Non-destructive color change
In order to use "multiply", you'll have to convert the roof to b/w and adjust the histogram in such a way that the natural colour of the roof becomes white. (As Hoogo mentioned, you'll lose highlights on the roof in that way, but "multiply" can only darken colours.)
Cheers
Burkhard.
P.S. Apologies, I didn't spend much time creating the mask for the roof …
To fix this, you can restore the highlights by creating a mask for a white layer from the light parts of the roof and put that semi-transparent layer on top – it should not be a problem to superimpose a semi-transparent layer on top of the multiplied layers.
I've attached a sample PLD file, the colour layer is in the group. Cheers
Burkhard.
P.S. Apologies, I didn't spend much time creating the mask for the roof …
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Re: Non-destructive color change
Wow Burkhard, that works great, thank you so much.
Tomorrow when I get to the office I´ll try it in the actual project and share the result.
Cheers
Juan
Tomorrow when I get to the office I´ll try it in the actual project and share the result.
Don´t worry, the most important thing is the guidelines.bkh hat geschrieben:P.S. Apologies, I didn't spend much time creating the mask for the roof …
Cheers
Juan
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Re: Non-destructive color change
Another, easy (lazy) way using a free plugin (no layers, no masks)
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Re: Non-destructive color change
Thanks, that´s a great solution but sadly for a non destructive color modification it doesn´t workSus hat geschrieben:Another, easy (lazy) way using a free plugin (no layers, no masks
Now, as promised here is the result using the guidelines shared by Burkhard (I owe you a beer or coffee ), I just adjust the highlights curve to have a little more smooth transition between dark and light areas.
I´m pretty happy with the result now, let´s see what the web master says. Cheers
Juan
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