Sumo Paint vs GrafX2
When comparing Sumo Paint vs GrafX2, the Slant community recommends GrafX2 for most people. In the question“What are the best pixel art / sprite editors?” GrafX2 is ranked 2nd while Sumo Paint is ranked 40th. The most important reason people chose GrafX2 is:
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](http://eab.abime.net/showthread.php?t=76519), and much more.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Has most of standard Photoshop filters
Pro Has a Chrome App
Chrome app can be downloaded here.
Pro Has advanced layers support
Pro Can save to cloud, locally, or directly copy to clipboard
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 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 Very large number of tools and effects
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 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 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 Supports tileset addition and extraction
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 Has a customizable UI with themes support
Theme UI style can easily be changed from settings including buttons and colors.
Pro Drawing constraint mode for vintage 8bits machine
The program is able to enforce the pixel constraints of old machines (C64, ZX Spectrum, Apple II, Game Boy Color, etc.)
For example, in ZX Spectrum mode, only 2 different colors can be used in a 8x8 pixel block.
Cons
Con Requires Flash
Con Slow to open
Sumo Paint is pretty slow to open when compared to other online photo editors.
Con Lacks drag and drop support
Doesn't yet support dragging & droping images in to the browser window.
Con Cannot zoom using mouse wheel
Con Dated look and feel
It looks like it was never supposed to be used in the modern world.
Con Lack of modern features
Some modern features that are necessary to do pixel art creation for game dev work are lacking.