diff --git a/openmc/filter.py b/openmc/filter.py
index 6cb81d97a..26629dafe 100644
--- a/openmc/filter.py
+++ b/openmc/filter.py
@@ -753,7 +753,7 @@ class MeshFilter(Filter):
         if n_dim == 3:
             # Construct 3-tuple of x,y,z cell indices for a 3D mesh
             nx, ny, nz = self.mesh.dimension
-            x = bin_index % nx + 1
+            x = (bin_index % nx) + 1
             y = (bin_index % (nx * ny)) // nx + 1
             z = bin_index // (nx * ny) + 1
             return (x, y, z)
@@ -761,7 +761,7 @@ class MeshFilter(Filter):
         elif n_dim == 2:
             # Construct 2-tuple of x,y cell indices for a 2D mesh
             nx, ny = self.mesh.dimension
-            x = bin_index % nx + 1
+            x = (bin_index % nx) + 1
             y = bin_index // nx + 1
             return (x, y)
         else:
diff --git a/openmc/plots.py b/openmc/plots.py
index a948c2a48..8eff78b1d 100644
--- a/openmc/plots.py
+++ b/openmc/plots.py
@@ -651,9 +651,16 @@ class Plot(IDManagerMixin):
 
         return element
 
-    def to_image(self, openmc_exec='openmc', cwd='.', convert_exec='convert'):
+    def to_ipython_image(self, openmc_exec='openmc', cwd='.',
+                         convert_exec='convert'):
         """Render plot as an image
 
+        This method runs OpenMC in plotting mode to produce a bitmap image which
+        is then converted to a .png file and loaded in as an
+        :class:`IPython.display.Image` object. As such, it requires that your
+        model geometry, materials, and settings have already been exported to
+        XML.
+
         Parameters
         ----------
         openmc_exec : str