AseWave

Water & Clouds generation plugin for Aseprite editor.

UI

UI is basic and shows all values even if they do not apply for particular method. Screenshot of UI and explanation of individual entries are:

Options description

• Scale width is a number of waves in width direction. Higher number means more waves.
• Scale height the same for height
• Seed different seed changes initial noise pattern
• Repeat Width checkbox enables to tile texture in width direction
• Repeat Height enables to tile in height
• Repeat in time enables to create endless loop animation
• Time step says how fast animation changes between two frames (ignored for a single frame)
• Frames number of frames to generate. Default is 1, e.g. no animation
• Method you can choose which method is used to generate texture. Options are Perlin FractalSum FractalSumAbs and Turbulence

Options valid only for FractalSum, FractalSumAbs and Turbulence method

• Persistance says how much huch contributes next step to final image. Value 0.5 means that next image has 50 % contribution, next one 25% etc. (0.5*0.5=0.25)
• Steps number of times the basic Perlin method is applied to final image

Options valid only for Turbulence

• Direction in which is Turbulence running through image. Width means it will go from left to right.

All methods use Perlin noise method for generation of random field.

Installation

Copy AseWave.lua into your Aseprite script folder and press F5 inside the editor to refresh its content.

Scripts folder can be found like this:

File -> Scripts -> Open Scripts Folder

Credit

This plugin is originally based on source code and ideas described below:

https://github.com/RenFinkle/noisy

https://github.com/weswigham/simplex/tree/master/lua

https://adrianb.io/2014/08/09/perlinnoise.html

https://ronvalstar.nl/creating-tileable-noise-maps

https://lodev.org/cgtutor/randomnoise.html

• With nice examples in Shadertoy as well:

https://gpfault.net/posts/perlin-noise.txt.html

https://www.scratchapixel.com/lessons/procedural-generation-virtual-worlds/perlin-noise-part-2

https://www.scratchapixel.com/lessons/procedural-generation-virtual-worlds/procedural-patterns-noise-part-1/simple-pattern-examples

Normal Map generation

Plugin NormalSprite.lua provides generation of normal map from selected image. You can select multiple frames at once to have whole animation transformed to normal maps in one step.

Method used for edge detection is Sobel.