New answers tagged texture
As Scott says, you'd probably be better off removing the background and replicating it. It looks as though you could create and use a pattern which would save you some time. That way would avoid all the extraneous artifacts and you could apply any other filter with ease.
No answer provides a more accurate result as conveniently as this one; and the source code for the soluton is provided. This will be a complementary answer about other directions you could take. First a filter based approximation of the pattern - like a crystalize effect as suggested by another contributor - like so: a fill color for the canvas (yellow ...
I would make a rectangle the same size as the artboard and turn it into a clipping mask. To do this, group together all the layers you wish to trim by selecting them and entering command+g. Next, make a rectangle with the same dimensions as your artboard, and center horizontally and vertically. With the rectangle layer in front, select both objects, enter ...
Here's an awesome tool that will generate the pattern for you: Flat Surface Shader for rendering lit triangles to a number of contexts including WebGL, Canvas 2D and SVG using Lambertian reflectance (see project details). Released under the MIT license. Perfect for web use, since it exports to svg.
you can achieve a look that is similar by filtering a gradient with the "crystalize" filter you might not get the 3d effect you are looking for but it's quick and easy.
There is no doubt that adding a texture will affect the image in some way. It also depends on what type of texture you want to use. But there are 2 methods you can try. Either set a high contrast texture where most of the values are white on multiply or use overlay for a texture where most of the values are a middle gray. Do you need further explanation? ...
In Inkscape you can simply apply Extensions > Generate from Path > Voronoi Pattern
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