The author's ideas are very rigorous. Before the production effect, first look for physical drawings carefully refer to the coffee surface color, lighting, foam structure, foam distribution and so do a detailed understanding; So carry out the follow-up work.
Before you start, observe the effect of what you want to make the most important to restore the place, and then in the mind of the operation steps, will make the entire production process more concise.
This is the original image, the focus of personal observation:
The background color of the coffee has mottled colour block, after all, the liquid such as a cup is difficult to do very pure, such effect in the production of appropriate exaggeration is also possible.
The white foam on the coffee, concentrated in the place more inclined to pure white, scattered thinner place biased to light soil yellow. The more concentrated the more compact the bubble, the more dispersed the place the greater the bubble. The place of concentration is a sort of a hill-like stereo figure with a slightly higher altitude, not a complete plane. It also means adding the right shade to the place where it is backlit.
Large bubbles have very small reflections in the direction of the light, with projections on the surface of the coffee.
Maybe it's just been stirred, the coffee has a very light spiral on the surface, and the grease on the coffee floats or something else has a tendency to wrap around.
Then, based on the content of these productions, the production steps are developed:
Do the background color first.
Make a spiral on the surface of the coffee. (Although I think so, but I forgot when I made it)
And then make the color block and broken bubble background. The individual wants the coloring block and the broken bubbles to be able to do together, after all, the color block is not so obvious.
Then do a more concentrated bubble background. The effect of the bubble is to knock out the background.
Finally with the filter to the overall texture of the three-dimensional processing.
Second, start production
First choose the background. (The filter effect below will adjust the value according to the actual needs.) It doesn't make sense to give a specified number if you do things differently. I'll write down every reason I use the filter.
Third, the new layer to do color spots and bubbles
Color spots and bubble edge are softer, so the brush hardness to the minimum, open with pen pressure control transparency. Color selection than the background brightness slightly higher, hue yellow as a sparse bubble. (see 2nd of observation)
The way of painting is more concentrated and more transparent in the middle. The margins are decentralized where transparency is low.
To do the middle and the edge of the white concentrated bubble background.
Again here I refer to the original image adjusted the color of the background.
When the air bubbles are hollowed out, they begin to have the effect of bubbles. When you knock out the 2nd, focus on the area there are several large bubbles, the rest are small bubbles, as far as possible to avoid too regular. (The color is adjusted again here).
Then the direction of the backlight to the white bubble plus light shade, give the preliminary three-dimensional sense. The edge uses the brush that has been used before to erase mode to wipe, avoid perfect.
Digging these finely broken bubbles here is a bit tiring, so I thought about whether there is a way to quickly knock out a lot of dense bubbles.
And then think of a way: with PS from the rendering of clouds to create disorderly color and brightness. Then use the noise with the threshold to convert the clouds into spots, and then use Gaussian blur to make these spots soft round spots. Then use the channels to select the spots to make the selection and use the selection to knock out the bubble layer.
(Add a thought to this method: First, the bubbles are hollowed out on the bubble background, and a quick knockout of many places is first thought to be a selection.) The question is how to make a tiny selection. Bubbles cannot be a hard edge, so these selections will have to be translucent and only use the channels. That direction becomes how to generate a large number of soft dense spots of a graph to extract the selection from the channel.
The position of the bubble needs to be randomly generated, and the cloud can only be used to define the randomness without material. Then the bubbles can be abstracted into dense dots, and the noise + threshold to change the clouds to small spots must be out of the running. It says that the edge of the bubble needs to be softer, so the dots can be treated as small dots with soft edges, stretching and Gaussian blur. )
The process is as follows:
1. Cloud Filter
2, add noise