diff --git a/lib/linguist/blob_helper.rb b/lib/linguist/blob_helper.rb
index d7f56de5..8c91dd94 100644
--- a/lib/linguist/blob_helper.rb
+++ b/lib/linguist/blob_helper.rb
@@ -142,6 +142,13 @@ module Linguist
       ['.png', '.jpg', '.jpeg', '.gif'].include?(extname)
     end
 
+    # Public: Is the blob a support 3D model format?
+    #
+    # Return true or false
+    def solid?
+      ['.stl', '.obj'].include?(extname)
+    end
+
     MEGABYTE = 1024 * 1024
 
     # Public: Is the blob too big to load?
diff --git a/samples/Binary/cube.stl b/samples/Binary/cube.stl
new file mode 100644
index 00000000..f4d2a267
Binary files /dev/null and b/samples/Binary/cube.stl differ
diff --git a/samples/Text/cube.obj b/samples/Text/cube.obj
new file mode 100644
index 00000000..5da92710
--- /dev/null
+++ b/samples/Text/cube.obj
@@ -0,0 +1,33 @@
+# test_file
+v -18.500000 -24.500000 31.000000
+v -18.500000 -24.500000 -0.001000
+v 12.500000 -24.500000 -0.001000
+v 12.500000 -24.500000 31.000000
+v -18.500000 6.500000 31.000000
+v -18.500000 6.500000 -0.001000
+v 12.500000 6.500000 31.000000
+v 12.500000 6.500000 -0.001000
+vn 0.000000 -1.000000 0.000000,
+vn 0.000000 -1.000000 0.000000,
+vn -1.000000 0.000000 0.000000,
+vn -1.000000 0.000000 0.000000,
+vn 0.000000 1.000000 0.000000,
+vn 0.000000 1.000000 0.000000,
+vn 1.000000 0.000000 0.000000,
+vn 1.000000 0.000000 0.000000,
+vn 0.000000 0.000000 -1.000000,
+vn 0.000000 0.000000 -1.000000,
+vn 0.000000 0.000000 1.000000,
+vn 0.000000 0.000000 1.000000,
+f 1//1 2//1 3//1
+f 1//4 3//4 4//4
+f 5//7 6//7 2//7
+f 5//10 2//10 1//10
+f 6//13 5//13 7//13
+f 6//16 7//16 8//16
+f 7//19 4//19 3//19
+f 7//22 3//22 8//22
+f 8//25 3//25 2//25
+f 8//28 2//28 6//28
+f 5//31 1//31 4//31
+f 5//34 4//34 7//34
diff --git a/samples/Text/cube.stl b/samples/Text/cube.stl
new file mode 100644
index 00000000..cd20b5c5
--- /dev/null
+++ b/samples/Text/cube.stl
@@ -0,0 +1,86 @@
+solid 
+  facet normal 0.000000E+00 -1.000000E+00 0.000000E+00
+    outer loop
+      vertex -1.850000E+01 -2.450000E+01 3.100000E+01
+      vertex -1.850000E+01 -2.450000E+01 -1.000000E-03
+      vertex 1.250000E+01 -2.450000E+01 -1.000000E-03
+    endloop
+  endfacet
+  facet normal 0.000000E+00 -1.000000E+00 0.000000E+00
+    outer loop
+      vertex -1.850000E+01 -2.450000E+01 3.100000E+01
+      vertex 1.250000E+01 -2.450000E+01 -1.000000E-03
+      vertex 1.250000E+01 -2.450000E+01 3.100000E+01
+    endloop
+  endfacet
+  facet normal -1.000000E+00 0.000000E+00 0.000000E+00
+    outer loop
+      vertex -1.850000E+01 6.500000E+00 3.100000E+01
+      vertex -1.850000E+01 6.500000E+00 -1.000000E-03
+      vertex -1.850000E+01 -2.450000E+01 -1.000000E-03
+    endloop
+  endfacet
+  facet normal -1.000000E+00 0.000000E+00 0.000000E+00
+    outer loop
+      vertex -1.850000E+01 6.500000E+00 3.100000E+01
+      vertex -1.850000E+01 -2.450000E+01 -1.000000E-03
+      vertex -1.850000E+01 -2.450000E+01 3.100000E+01
+    endloop
+  endfacet
+  facet normal 0.000000E+00 1.000000E+00 0.000000E+00
+    outer loop
+      vertex -1.850000E+01 6.500000E+00 -1.000000E-03
+      vertex -1.850000E+01 6.500000E+00 3.100000E+01
+      vertex 1.250000E+01 6.500000E+00 3.100000E+01
+    endloop
+  endfacet
+  facet normal 0.000000E+00 1.000000E+00 0.000000E+00
+    outer loop
+      vertex -1.850000E+01 6.500000E+00 -1.000000E-03
+      vertex 1.250000E+01 6.500000E+00 3.100000E+01
+      vertex 1.250000E+01 6.500000E+00 -1.000000E-03
+    endloop
+  endfacet
+  facet normal 1.000000E+00 0.000000E+00 0.000000E+00
+    outer loop
+      vertex 1.250000E+01 6.500000E+00 3.100000E+01
+      vertex 1.250000E+01 -2.450000E+01 3.100000E+01
+      vertex 1.250000E+01 -2.450000E+01 -1.000000E-03
+    endloop
+  endfacet
+  facet normal 1.000000E+00 0.000000E+00 0.000000E+00
+    outer loop
+      vertex 1.250000E+01 6.500000E+00 3.100000E+01
+      vertex 1.250000E+01 -2.450000E+01 -1.000000E-03
+      vertex 1.250000E+01 6.500000E+00 -1.000000E-03
+    endloop
+  endfacet
+  facet normal 0.000000E+00 0.000000E+00 -1.000000E+00
+    outer loop
+      vertex 1.250000E+01 6.500000E+00 -1.000000E-03
+      vertex 1.250000E+01 -2.450000E+01 -1.000000E-03
+      vertex -1.850000E+01 -2.450000E+01 -1.000000E-03
+    endloop
+  endfacet
+  facet normal 0.000000E+00 0.000000E+00 -1.000000E+00
+    outer loop
+      vertex 1.250000E+01 6.500000E+00 -1.000000E-03
+      vertex -1.850000E+01 -2.450000E+01 -1.000000E-03
+      vertex -1.850000E+01 6.500000E+00 -1.000000E-03
+    endloop
+  endfacet
+  facet normal 0.000000E+00 0.000000E+00 1.000000E+00
+    outer loop
+      vertex -1.850000E+01 6.500000E+00 3.100000E+01
+      vertex -1.850000E+01 -2.450000E+01 3.100000E+01
+      vertex 1.250000E+01 -2.450000E+01 3.100000E+01
+    endloop
+  endfacet
+  facet normal 0.000000E+00 0.000000E+00 1.000000E+00
+    outer loop
+      vertex -1.850000E+01 6.500000E+00 3.100000E+01
+      vertex 1.250000E+01 -2.450000E+01 3.100000E+01
+      vertex 1.250000E+01 6.500000E+00 3.100000E+01
+    endloop
+  endfacet
+endsolid 
diff --git a/test/test_blob.rb b/test/test_blob.rb
index 966c2743..3569a8ec 100644
--- a/test/test_blob.rb
+++ b/test/test_blob.rb
@@ -132,6 +132,12 @@ class TestBlob < Test::Unit::TestCase
     assert !blob("Binary/octocat.psd").image?
   end
 
+  def test_solid
+    assert blob("Binary/cube.stl").solid?
+    assert blob("Text/cube.stl").solid?
+    assert blob("Text/cube.obj").solid?
+  end
+
   def test_viewable
     assert blob("Text/README").viewable?
     assert blob("Ruby/foo.rb").viewable?