Like the glowing effect you see on neutrons. Is it a property or do i have to have custom draw code?
It requires a graphics function, example:
local function NeutG(i, r, g, b)
return 1, 0x00010001, a, r, g, b, fa, fr, fg, fb
end
tpt.graphics_func(NeutG, tpt.element('neut'))
You replace the 0x00010001 with what you want from the "Particle graphics function modes"
at https://powdertoy.co.uk/Wiki/W/Lua_API:Renderer.html
a,r,g,b stand for alpha, red ,green, blue, the colors of your element, and fa, fr, etc are the colors of the glowing effect
in tpt.element('neut') you replace neut with the 4 letters of the desired element