prism.stl

solid OpenSCAD_Model
  facet normal -0 0 1
    outer loop
      vertex 0 15 20
      vertex 10 0 20
      vertex 10 15 20
    endloop
  endfacet
  facet normal 0 0 1
    outer loop
      vertex 10 0 20
      vertex 0 15 20
      vertex 0 0 20
    endloop
  endfacet
  facet normal 0 0 -1
    outer loop
      vertex 0 0 0
      vertex 10 15 0
      vertex 10 0 0
    endloop
  endfacet
  facet normal -0 0 -1
    outer loop
      vertex 10 15 0
      vertex 0 0 0
      vertex 0 15 0
    endloop
  endfacet
  facet normal 0 -1 0
    outer loop
      vertex 0 0 0
      vertex 10 0 20
      vertex 0 0 20
    endloop
  endfacet
  facet normal 0 -1 -0
    outer loop
      vertex 10 0 20
      vertex 0 0 0
      vertex 10 0 0
    endloop
  endfacet
  facet normal 1 -0 0
    outer loop
      vertex 10 0 20
      vertex 10 15 0
      vertex 10 15 20
    endloop
  endfacet
  facet normal 1 0 0
    outer loop
      vertex 10 15 0
      vertex 10 0 20
      vertex 10 0 0
    endloop
  endfacet
  facet normal 0 1 -0
    outer loop
      vertex 10 15 0
      vertex 0 15 20
      vertex 10 15 20
    endloop
  endfacet
  facet normal 0 1 0
    outer loop
      vertex 0 15 20
      vertex 10 15 0
      vertex 0 15 0
    endloop
  endfacet
  facet normal -1 0 0
    outer loop
      vertex 0 0 0
      vertex 0 15 20
      vertex 0 15 0
    endloop
  endfacet
  facet normal -1 -0 0
    outer loop
      vertex 0 15 20
      vertex 0 0 0
      vertex 0 0 20
    endloop
  endfacet
endsolid OpenSCAD_Model