diff --git a/pdfium/bug_481_coons_patch.pdf b/pdfium/bug_481_coons_patch.pdf
new file mode 100644
index 0000000..2c213a1
--- /dev/null
+++ b/pdfium/bug_481_coons_patch.pdf
Binary files differ
diff --git a/pdfium/bug_481_coons_patch_expected.pdf.0.png b/pdfium/bug_481_coons_patch_expected.pdf.0.png
new file mode 100644
index 0000000..4035b76
--- /dev/null
+++ b/pdfium/bug_481_coons_patch_expected.pdf.0.png
Binary files differ
diff --git a/pdfium/bug_481_free_form_gouraud.pdf b/pdfium/bug_481_free_form_gouraud.pdf
new file mode 100644
index 0000000..33866f9
--- /dev/null
+++ b/pdfium/bug_481_free_form_gouraud.pdf
Binary files differ
diff --git a/pdfium/bug_481_free_form_gouraud_expected.pdf.0.png b/pdfium/bug_481_free_form_gouraud_expected.pdf.0.png
new file mode 100644
index 0000000..4035b76
--- /dev/null
+++ b/pdfium/bug_481_free_form_gouraud_expected.pdf.0.png
Binary files differ
diff --git a/pdfium/bug_481_lattice_form_gouraud.pdf b/pdfium/bug_481_lattice_form_gouraud.pdf
new file mode 100644
index 0000000..30627d5
--- /dev/null
+++ b/pdfium/bug_481_lattice_form_gouraud.pdf
Binary files differ
diff --git a/pdfium/bug_481_lattice_form_gouraud_expected.pdf.0.png b/pdfium/bug_481_lattice_form_gouraud_expected.pdf.0.png
new file mode 100644
index 0000000..4035b76
--- /dev/null
+++ b/pdfium/bug_481_lattice_form_gouraud_expected.pdf.0.png
Binary files differ
diff --git a/pdfium/bug_481_tensor_product.pdf b/pdfium/bug_481_tensor_product.pdf
new file mode 100644
index 0000000..0474967
--- /dev/null
+++ b/pdfium/bug_481_tensor_product.pdf
Binary files differ
diff --git a/pdfium/bug_481_tensor_product_expected.pdf.0.png b/pdfium/bug_481_tensor_product_expected.pdf.0.png
new file mode 100644
index 0000000..4035b76
--- /dev/null
+++ b/pdfium/bug_481_tensor_product_expected.pdf.0.png
Binary files differ