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S1: preparing for a photo 85x85pixels; S2: transfer to coding: jsfiddle.net/jarvis_chan/v17rtjtk/ Copy the coding S3: OpenSCAD(recommended to use "devlopment snapshots开发版）, open atth, past image code in image var arr=();   S4:>>> save as STL   Code of atth mentioned in S3: arr=;(where to put picture coding) r=70; sphere 1/2diameter hd=1.2; sphere thickness height=85； width=85; hj=4;横竖像点间距 wj=4; zoom=2.5; 可以改小一点，假如出现孔连 difference(){   difference(){     translate([0,0,r])sphere(r);     translate([0,0,r])sphere(r-2*hd);     translate([0,0,-0.7*r])cube(2*r,true);  } for(h=[0:1:height]){  for(w=[0:1:width]{    if(arr[h*height+w].0.1{     hull(){        translate([(height/2-w)*wj,(height/2-h)*hj,2*r]) cube(arr[h*height+w]*zoom,,true);  cube(0.001,true); }}}}}  

Part 2: Polystyrene capacitor

Polystyrene capacitors provide high insulation, low leakage, low dielectric absorption, low distortion and excellent temperature stability.