Home › Forums › The Learning Center › Color Theory and Mixing › Visualising the effect of a glaze
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April 22, 2018 at 5:01 pm #454984
Does anyone know the best way to simulate the effect of a colour glaze on a painting? Say, with photoshop over a photo of the painting, or some other method?
Thanks,
RichardApril 22, 2018 at 7:18 pm #609264Does anyone know the best way to simulate the effect of a colour glaze on a painting? Say, with photoshop over a photo of the painting, or some other method?
Thanks,
RichardYou could attempt to use layers combined with the “multiply” setting. Notice, however, that the optical effect is not exactly the same. Real-life glazing has a “staining glass” / 3d effect that heavily depends on how physical layers trap light and make it bounce back to your eyes.
April 22, 2018 at 7:45 pm #609266I do not know of any method in done in a computer. I have seen two books dealing with this so far.
Taubes Guide to Oil Painting
Carlson’s Guide to Landscape Painting (just a brief commment)The first one contains two pages showing the effect of glazes over several colors, so you could do the same in real life and use it as reference.
The second one mentions the technique of using a piece of glass, over this glass you paint your dark transparent color and place it over the area on the painting to see the effect.
April 23, 2018 at 3:14 am #609269Thank you both!
April 23, 2018 at 4:12 am #609262I use Photoshop Elements 8 (a very old version) and yes it can do that, or at least a good simulation of it:
filter > adjustments > photo filter
Keep ‘preserve luminosity’ unchecked.
I don’t know how similar or different it is in newer versions of Photoshop.
April 23, 2018 at 9:22 am #609268You could paint a piece of clear plastic and hold it over your painting. Or maybe some tinted glasses. Or maybe paint your glasses
Check out my work in the acrylics Hall of Fame Camellia WIP
oil and acrylic paintings..
April 23, 2018 at 10:37 am #609270Ah, thanks Patrick, I will try that out as well!
April 23, 2018 at 11:13 pm #609267I do something similar in GIMP. As Patrick already noted, you must NOT preserve luminosity. Other than reflection from the glossy surface of a glaze, the glaze darkens what’s already there.
Scumbling, where a lighter and opaque color is placed atop the painting, is harder to simulate in software.
Both Photoshop and GIMP, and some other programs, have a “paint brush” tool, which allows you to “paint” a partially transparent layer, just where you need it. If done as layer (rather than directly on the existing image) you can retroactively change the transparency.
April 24, 2018 at 5:11 pm #609271The photo filter in Photoshop seems to work very well!
April 29, 2018 at 10:14 pm #609263Maybe try laying one of these over the subject? They may be a bit too strong in color sometimes, but should at least give you an idea of where you can go with a given glaze. Nice thing here is that you could cut them down into smaller sizes for making a quick reference ring that you just flip through while holding it over the subject. Just a thought, I do wish they came in paler colors though.
- Delo DelofashtMay 21, 2018 at 2:52 pm #609265 -
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