tile squares with random colours from a palette

[Espermaschine]

Is there a filter or a script that lets me tile squares with different colours in a random fashion ?

Lets say i have a red, a black and a yellow 40x40px square and i want x rows and x columns.

Like this:
   

[Ofnuts]

• Generate solid noise (defatil roughly the size of the tiles) and add contrast
  
• Filter>Blur>Pixelize by the size of the tiles
  
• Copy to channel
  
• Add you color layers
  
• For each color layer (except bottom),
  • add a layer mask and initialize it to the saved channel
    
  • Threshold the layer mask (high values on top layers)
    

With some luck some of it can be done with my luminosity-tiler script.

[Espermaschine]

(07-30-2018, 11:29 PM)Ofnuts Wrote:

• Generate solid noise (defatil roughly the size of the tiles) and add contrast
  
• Filter>Blur>Pixelize by the size of the tiles
  
• Copy to channel
  
• Add you color layers
  
• For each color layer (except bottom),
  • add a layer mask and initialize it to the saved channel
    
  • Threshold the layer mask (high values on top layers)
    

good idea !

i noticed we already discussed something similar in your bathroomtile thread and you mentioned the G'MIC - Taquin filter, which is another option, but its limited to 20x20 tiles


EDIT:

(07-30-2018, 11:29 PM)Ofnuts Wrote: Threshold the layer mask (high values on top layers)

im still having a hard time with the thresholding
i want a 12px square tile, my canvas is 480px
i render solid noise 12x12, then Pixelize 12x12 and auto stretch contrast

so for four colours i do what ?

divide 255 by 4 = 64

top layer threshold 255 - 64 = 191 (left handle)
second layer from top 255 - 128 = 127
third layer from top 255 - 192 = 63

that gives me an uneven distribution of colours...is my calculation wrong ?

   

[Ofnuts]

Look at the histogram of solid noise, it is far from flat.... You have to compensate for this. And by the way, with the histogram dialog, you can easily determine the limits of a range that contains 25% of the pixels.