www.drububu.com, portfolio arjan westerdiep

Pixel Art & Adobe Photoshop

Adobe Photoshop is the industry standard for (bitmap) image manipulation.
Besides MS Paint, Microangelo, Pixen, Gimp and many other programs, Adobe Photoshop can be used to create pixel art.
Adobe Photoshop offers many options you don't need for pixel art, and is quite expensive.

MS Paint is my weapon of choice for creating pixel art, in combination with Adobe Photoshop.
In particular, the layer options in Adobe Photoshop can be handy from time to time, since MS Paint lacks this feature. Besides layers, Adobe Photoshop offers all options you need, and more, to adjust bitmap images, such as scanned sketches. Options like contrast enhancement, dithering, scaling, color-correction, etc.

To limit the overall size of this tutorial, only a few options will be discussed in this chapter.

History

Back in 1987, Thomas Knoll began writing a program to simulate grayscale images on the monochrome display of early home computers. Thomas and his brother John continued writing image manipulation code, which resulted in a program called 'Display'. 'Display' ultimately became 'Photoshop'.
Adobe purchased the license in 1988, and Photoshop 1.0 was released in 1990, exclusively for Macintosh.

RGB versus Indexed Color Palettes

Adobe Photoshop provides different image modes: RGB, CMYK, grayscale and indexed color.

Indexed colored images differ from images in other modes: an indexed colored image uses a global palette or color table. Each individual pixel in the image refers to a specific color within the color table. By changing the pallete color, all the pixels that refer to the changed pallete color change color.
If you don't use the indexed color mode but RGB (or any other mode), each individual pixel contains information about its color, instead of referring to a color table. To change an area with pixels with a specific red color into an RGB image, you need to select all the red pixels and give them a new color; there's no global palette used in this type of image mode.

If you use a palette with limited colors and you choose to work in the RGB mode, you can guarantee that you use the same color red for every individual pixel: draw a palette in the image and use the color picker to choose the preffered color of your drawn palette.

The question as to whether you will use the indexed color mode or another mode, depends on the amount of colors available in your palette. Choose the indexed color mode if you use less than 256 colors, choose RGB or any other mode if you use a more than 256 colors.

Palette

I use the default sixteen color windows palette in MS Paint.
Once in a while, I take a look at the pixel art illustration in Adobe Photoshop, with the right colors.
By the right colors, I mean the colors of the default or 'drububu' palette that I use for my personal pixel art illustrations.

ms paint indexed color palette default and customized color palette MS Paint indexed color palette default and customized color palette

The image on the left is the illustration made in MS Paint. The colors don't match with the colors of the default 'drububu' palette. In Adobe Photoshop the standard window palette colors are replaced by the colors of the 'drububu' palette (see right image).

By using an indexed color BMP as the source, each pixel refers to a specific color in the lookup or color table. To change the color table, all you have to do is load a custom palette to adjust the colors.
The palette with the custom colors needs to be made once, and then it can be used as many times you like.

The approach above only works if you use a limited palette for your pixel art illustration.
If you use many colors, working solely in Adobe Photoshop may be a better option.

Adjusting the Color Table

In Adobe Photoshop, you can import a custom palette to overwrite the color table of a color indexed image ('Image' > 'Mode' > 'Color Table').
Click on a color in the color table window to change the color. The color window appears. Choose any color you like by moving the mouse inside the colored area, or if you know the exact RGB or HEX color, type the specific value(s) in the appropriate fields.
Repeat this process for each color in the color table you want to change. Once finished, choose the 'Save' option in the color table window.
The next time you want to change the color table of a color indexed image with the same amount of colors, choose the 'Load' option and select the palette you just saved.

adobe photoshop color table adjustment Adobe Photoshop color table adjustment

Creating Pixel Art in Adobe Photoshop

Pixel art can be created solely in Adobe Photoshop.
Adobe Photoshop has some extra features which MS Paint lacks, such as layers and 'sexiness'; it's cool to work with Adobe Photoshop... but it's no guarantee your work will be good.

By drawing in different layers, artwork is separated from each other. If you make mistakes, the content of a layer can be removed without interfering with the artwork in the other layers.
Layers can also be made visible/invisible, which can be handy when focusing on specific artwork in a specific layer.
In Adobe Photoshop, all kinds of features can be applied to layers, such as masking, luminosity, saturation, and many, many more options.

To create an Adobe Photoshop file choose 'File' > 'New' or use the shortcut CTRL + N; the new window appears.

adobe photoshop new window Adobe Photoshop new window

Fill in a name, or leave it as it is. The next thing you have to do is to choose a size. The exact size is not important, but the type of unit is: choose 'pixels'.
Be sure to use 72 pixels per inch and set the color mode to RGB. An 8-bit color depth is sufficient.

Once you set your preferences, press 'OK'.
To be secure, directly save your newly create Adobe Photoshop file before you start. Save your work on regular intervals. Consider to save your work over time as different files: drububu_00.psd, drububu_01.psd, drububu_02.psd, and so forth. In case you make a mistake, or delete or merge layers which you shouldn't, you can rely on a previous version, and by doing so loose some time but not too much time.

Unlike MS Paint, Adobe Photoshop doesn't show a palette. You can choose between two colors, a background color and a foreground color. To adjust/change these colors, double click on one of them and choose any color you like.
To prevent endless clicking, it's handy to create a palette with the colors you need in a separate layer.
Draw some rectangles and fill them with the colors you need.

adobe photoshop canvas and layers window Adobe Photoshop canvas and layers window

The Eyedropper tool - shortcut I - can be used to quickly select the preferred color.
To switch back to the Pencil tool, use the shortcut B. To change the foreground and background color, use X.
To zoom in and out, use the zoom tool; shortcut Z.
To zoom, you can also used the key combination CTRL + to zoom in, or CTRL - to zoom out.

adobe photoshop tools; eyedropper tool, pencil tool and zoom tool Adobe Photoshop tools; eyedropper tool, pencil tool and zoom tool

Once you are satisfied with the result, you can export your Adobe Photoshop file as GIF or PNG.
Choose 'File' > 'Save for Web and Devices...', or 'ALT + SHIFT + CTRL + S', and then choose the required file format and settings.

Scaling Pixel Art

More about scaling pixel art in Adobe Photoshop can be found in the ' 'Scaling Pixel Art' chapter.

Magic Wand Tool

Information about the Magic Wand option in Adobe Photoshop can be found in the ' 'Outline/Shading' chapter.

Layers

The use of layers in Adobe Photoshop offers numerous possibilities for combining different pixel art illustrations.
The second example in the 'Outline/Shading' chapter shows the use of layers in Adobe Photoshop.