How to remove “triangle” line from GraphicsComplex objects

Code follows:

partsName = {
"1.stl", "2.stl", "3.stl", "4.stl", "5.stl", "6.stl", "7.stl", "8.stl", "9.stl"
};

robotPartsGraphics = Import[#, "GraphicsComplex"] & /@ partsName;

Graphics3D[{robotPartsGraphics}]


and now, I want to remove the "triangle" line from the picture. What can I do? (Comment: CAD product, format "stl" -> contains GraphicsComplex data.

I appreciate Szabolcs's and Kuba's advice, all can work successfully! add EdgeForm[None] in last code sentence. The successful code is: Graphics3D[{EdgeForm[None], robotPartsGraphics}].

Thank you again!

• I do not understand what you mean by "triangle line". Try Graphics3D[{EdgeForm[None], robotPartsGraphics}] – Szabolcs Aug 31 '17 at 8:36
• Thank you very much! i means the "connect line" in function "graphicscomplex ", like the black connect line in picture – Ben Aug 31 '17 at 8:50
• Can you respond to my suggestion above to confirm if I understood your question? – Szabolcs Aug 31 '17 at 8:54
• EdgeForm[None] can work successfully! thank you again! – Ben Aug 31 '17 at 8:54

Graphics3D[{EdgeForm[None],

• EdgeForm[] works as well. – J. M. will be back soon Aug 31 '17 at 9:47