When comparing GrafX2 vs Cosmigo Pro Motion NG, the Slant community recommends GrafX2 for most people. In the question“What are the best pixel art / sprite editors?” GrafX2 is ranked 4th while Cosmigo Pro Motion NG is ranked 8th.
Ranked in these QuestionsQuestion Ranking
Pro Supports tileset addition and extraction
Pro Scriptable using Lua
GrafX2 is scriptable using the Lua language, which can be used to automate tasks and add new functionality to it. The script library features advanced color reduction and enhancement tools, palette analysis, and much more.
Pro Very large number of tools and effects
Pro Supports many file formats
GrafX2 supports many file formats, including the popular gif and png, but also importing and exporting from deluxe paint, degas elite, and various other editors using custom formats.
Pro Supports animations
The program has a basic support for animation using frames in newer versions. Graphics can be cloned and copied between frames and changed slightly.
See here how to animate with GrapfX2 https://www.youtube.com/watch?v=Gnq6zBZOqoM
Pro Free, open source, and cross-platform
GrafX2 is totally free to use, copy, and modify. It's available on Windows, Linux, Mac OS X, Haiku, AROS, MorphOS, SkyOS, Syllable, Mint, and a few more systems. Basically anything is supported by the SDL library.
Pro Has a great palette tool
You can create gradients from one color to another, work in either RGB or HSL color space, save and load palettes, sort and organize palettes, and even work on "color cycling" images.
Pro Has a customizable UI with themes support
Theme UI style can easily be changed from settings including buttons and colors.
Pro Palette Color Cycling
GraphX2 being based on older 256 bitmap software has inherited some tricks that modern pixel editors do not have . One of them being the ability to cycle color palette and produce animations and effects with it.
Pro Good tilemap editing tools
Tilemap can be drawn with tools that automatically keep your palette of tiles consistent. Both free painting and tile-placing modes work in the same workspace allowing you to easily switch between workflows.
Pro Supports palette indexing
You can separate the color information out of the image file into a separate palette file.
Pro Supports custom grids
The user can create normal rastered or custom grids with custom shapes, or they can just mix up all they want.
Pro Onion Skinning support
You can use Onion Skinning to see surrounding frames to help create animations.
Pro Marquee select allows you to see your results
Pro Motion gives you a direct feel for the pixels: how they will lay down when pressed as soon as you've finished marquee selecting. It's thus very easy to drag around to get a perfect look, moving it a few pixels here or there.
Related to this then is the way you can play with single-color mode. You can drag-click the 'paste' to create different colored silhouettes of the selection. Even while zoomed in, you can see the exact pixels as they would be rendered if set down where your mouse is.
Pro Includes almost all original DPaint and PPaint functionality
Oldschool pixel artists will find all their beloved functions from the Amiga Pixel Art Programs, DPaint and PPaint. Such functions include smear, paint, color cycle, mirror, kaleidoscope, tint, smooth, fill with dither or random dither, fill with spherical color fade, auto outline, and tons more.
Most keyboard shortcuts are the same as those of DPaint, so you immediately feel at home with ProMotion. You can of course re-define them as you wish.
Pro Transparent 'color' behaves like any other color on the canvas
If you want to create a simple 'masking', it's very simple. Most normal paint programs have transparency, but what they don't let you do is treat transparency as if it were another pixel on the screen.
Typically, you are required to set up layers, and use eraser to block/unblock areas to get the effect you want. This is both long-winded and uncomfortable.
Pro Free limited functionality version
There is a free version available for Pro Motion that has a limited feature set but is a good way to check out the software. This is also a good choice for those who do not need many features but want to use a simple pixel editor. The limitations of the free version can be seen here.
Pro Revamped Layer System (NG) support
Pro Motion supports the regular Layer System you would expect from Photoshop, but with the added support of animation layers (which have frames) and static image layers (for templates, backgrounds, or other static elements).
Pro Background color is accessible by right-click
Pro Motion gives you instant right-click access to the background color. This is useful in cases where pixels are very close to each other and you are not able to easily get the balance of each color right.
Pro Offers drawing masks and brush capture masks
You can easily create a mask to protect part of the image against modification, or to exclude part of the image from the brush capture action. The mask is created either by selecting the colors (from the palette or directly from the image), or by drawing it using any of the available tools (pencil, line, circle, box, etc.) Once defined, you can freeze the mask or let the program update it, based on the drawing colors.
Pro Brush containers useful for animations
The user can copy any part of the frame or even whole animations and use them as brushes or just store them for easy re-use later.
Pro Gradient Tool
There's a Gradient Tool with several modes of dithering.
Pro Supports layers
Con Ancient interface
The interface looks and feels like it came out of a 20 year old commodore amiga.
Con Pro version and upgrades come at a price
The Pro version of Cosmigo Pro Motion costs $39 and includes a number of features that aren't available in the limited free version.
If you have an existing Pro Motion license, it costs $19 to upgrade to the newest version or you stick with the feature limited free edition.
Con Supports Windows only
Pro Motion only supports Windows, but you can easily run it on macOS and Linux using Wine, PlayOnMac, PlayOnLinux etc.