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Dodge and Burn with Overlay Neutral Color 50% Grey?

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Hello and Greetings from Germany.

I bought Affinity Photo and it is great. Love it.

 

But one question:

with photoshop I use the dodge and burn technique with adding a new layer with overlay mode and "fill with overlay neutral color 50% grey" option, than I painted the light and shadows with white and black brush. This was the best technique for me. Is there a similar way to work with affinity photo with this technique?

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I've tried this and it doesn't work. I've got a pixel layer, exactly 50%, overlay (also tried soft light) and even if I don't do any dodge or burn effects the layers beneath clearly get influenced by the gray layer. In photoshop this doesn't happen since the 50% gray get discarded. Is there a problem with the blending mode? I'm working in CMYK and I have Live Effects on the layer and some adjustment layers but the 50% gray is at the absolute top of the layer structure.

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mikaelcedergren,

 

If you place your pixel layer at the top of the layers, it will affect everything below it. If you want it not to affect some 'upper' layers, place it below them in the layers panel.


Affinity Photo 1.7.1 & Affinity Designer 1.7.1; macOS High Sierra 10.13.6 iMac (27-inch, Late 2012); 2.9GHz i5 CPU; NVIDIA GeForce GTX 660M; 8GB RAM
Affinity Photo 1.7.0.135 & Affinity Designer 1.7.0.9 for iPad; 6th Generation iPad 32 GB; Apple Pencil; iOS 12.3.1

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Thanks R C-R. I get that, but the issue is that a 50% gray overlayed pixel layer shouldn't affect any layers at all, at least no visible affect. It doesn't in photoshop, but in Affinity it does therefore I cannot use the non-destructive dodge/burn technique. Maybe I missed pointing out one thing - I haven't dodged or burned anything on the 50% gray pixel layer. It's just flat and still affects all layers visibly.

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Hi mikaelcedergren,

Welcome to Affinity Forums :)

Drag the grey overlay layer over the right part of the main image layer in the Layers panel (not over its thumbnail) until a blue horizontal line appears, then release the mouse. The grey overlay layer will now only affect its parent (the main image layer).

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MBd... you're the king!

 

I tried using the RGB values and now it works. Definitely a failure in the calculations in Affinity, but at least I can do it now. :) Sucks having to do destructive dodge/burn.

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can someone look at this again and tell if there is any way in AP to get a neutral grey layer in CMYK?

I am way out of my depth here but I thought "neutral grey" in CMYK color space was multivalued, & picking the "right" one depended on the printing conditions, ICC profiles in use, etc.

 

Like is mentioned here, "K" isn't black, it is the key color, so (as I understand it) its "blackness" can vary depending on the ink, the printing process, & the whiteness of the page. The article also discusses the methods used to calculate grey values (like UCR & GCR) for black replacement thresholds when the choice is between mixing CMY & K for reasons of economy or whatever. I do not pretend to understand this very well -- only the basic idea that mixing CMY inks don't produce the full range of grays & the K ink can compensate for that to a greater or lesser degree.


Affinity Photo 1.7.1 & Affinity Designer 1.7.1; macOS High Sierra 10.13.6 iMac (27-inch, Late 2012); 2.9GHz i5 CPU; NVIDIA GeForce GTX 660M; 8GB RAM
Affinity Photo 1.7.0.135 & Affinity Designer 1.7.0.9 for iPad; 6th Generation iPad 32 GB; Apple Pencil; iOS 12.3.1

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I wonder if the neutral grey in CMYK in PS is dependent on the printer profile in use, & if so do the CMYK values change if you change profiles? I also wonder if the same thing applies to AP, but I am too lazy otherwise occupied to check that for myself.  ^_^


Affinity Photo 1.7.1 & Affinity Designer 1.7.1; macOS High Sierra 10.13.6 iMac (27-inch, Late 2012); 2.9GHz i5 CPU; NVIDIA GeForce GTX 660M; 8GB RAM
Affinity Photo 1.7.0.135 & Affinity Designer 1.7.0.9 for iPad; 6th Generation iPad 32 GB; Apple Pencil; iOS 12.3.1

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I've been trying to do non-destructive dodge/burn in CMYK mode, too, and the grey fill + overlay technique doesn't work. Has anyone found a way to do non-destructive dodge-burn in CMYK? It seems like this should be doable somehow. Affinity is pretty good at making things possible, if sometimes a bit obscure.

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Are you adding a new pixel layer above the one you want to burn/dodge? I always add a new pixel layer, fill with 50% grey, change the blend mode to overlay. Seems to work on both rgb and cymk images. All the d&b is on the new layer which make it non-destructive.

Screen Shot 2017-11-12 at 12.57.31 PM.png

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The opacity of the Dodge Brush and Burn Brush tools is set to 25% by default, so (depending on the image you're working on) the effect may be quite subtle. To convince yourself that something is really happening, try increasing the opacity setting to 50% or more.


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Affinity Designer 1.7.0.367 • Affinity Photo 1.7.0.367 • Windows 10 Home (4th gen Core i3 CPU)
Affinity Photo for iPad 1.7.0.135 • Affinity Designer for iPad 1.7.0.9 • iOS 12.3.1 (iPad Air 2)

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Hi Applewood!

 

In RGB mode, the 50% gray plus overlay works perfectly. In RGB, adding the new pixel layer produces no visible changes in my image until I dodge/burn. In CMYK, however, just adding the 50%-gray layer immediately changes the tone of the entire image. Does that not happen for you?

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