diff --git a/psychoblend/objects.py b/psychoblend/objects.py
index 713cd6d..b503a78 100644
--- a/psychoblend/objects.py
+++ b/psychoblend/objects.py
@@ -1,6 +1,7 @@
 import bpy
 
 from .util import escape_name, mat2str, needs_def_mb, needs_xform_mb, ExportCancelled
+from mathutils import Vector, Matrix
 
 def make_object_data_cache(render_engine, depsgraph, ob, name):
     if ob.type == 'MESH':
@@ -18,6 +19,9 @@ class Mesh:
     """
     def __init__(self, render_engine, depsgraph, ob, name):
         self.name = name
+        self.material_name = None
+        if len(ob.material_slots) >= 1 and ob.material_slots[0].material != None:
+            self.material_name = ob.material_slots[0].material.name
         self.is_subdiv = ob.data.psychopath.is_subdivision_surface
         self.needs_mb = needs_def_mb(ob)
         self.time_meshes = []
@@ -43,6 +47,10 @@ class Mesh:
             w.write("SubdivisionSurface $%s {\n" % self.name)
             w.indent()
 
+        # Material bindings.
+        if self.material_name != None:
+            w.write("SurfaceShaderBind [${}]\n".format(self.material_name))
+
         # Write vertices and (if it's smooth shaded) normals
         for ti in range(len(self.time_meshes)):
             w.write("Vertices [")
@@ -132,12 +140,12 @@ class RectLamp:
             self.time_dim += [(ob.data.size, ob.data.size_y)]
         else:
             self.time_dim += [(ob.data.size, ob.data.size)]
-    
+
     def cleanup(self):
         pass
     
     def export(self, render_engine, w):
-        render_engine.update_stats("", "Psychopath: Exporting %s" % self.ob.name)
+        render_engine.update_stats("", "Psychopath: Exporting %s" % self.name)
 
         w.write("RectangleLight $%s {\n" % self.name)
         w.indent()
@@ -175,8 +183,11 @@ class DistantDiskLamp:
 
         self.time_rad += [ob.data.shadow_soft_size]
 
+    def cleanup(self):
+        pass
+
     def export(self, render_engine, w):
-        render_engine.update_stats("", "Psychopath: Exporting %s" % self.ob.name)
+        render_engine.update_stats("", "Psychopath: Exporting %s" % self.name)
         w.write("DistantDiskLight $%s {\n" % self.name)
         w.indent()
         for direc in self.time_dir:
@@ -197,7 +208,6 @@ class DistantDiskLamp:
 
 # class Instance:
 #     def __init__(self, render_engine, depsgraph, ob, data_name):
-#         self.ob = ob
 #         self.data_name = data_name
 #         self.needs_mb = needs_xform_mb(self.ob)
 #         self.time_xforms = []
diff --git a/psychoblend/psy_export.py b/psychoblend/psy_export.py
index cf9652b..df888a3 100644
--- a/psychoblend/psy_export.py
+++ b/psychoblend/psy_export.py
@@ -2,6 +2,7 @@ import bpy
 
 from math import log
 
+from .material import Material
 from .objects import make_object_data_cache, Mesh, DistantDiskLamp
 from .util import escape_name, mat2str, ExportCancelled
 from .world import World, Camera
@@ -53,6 +54,9 @@ class PsychoExporter:
         self.sun_lamp_data = {} # name -> cached_data
         self.sun_lamp_instances = {} # instance_id -> [sun_lamp_data_name, transform_list]
 
+        # For all materials.
+        self.materials = {} # name -> cached_data
+
         # Motion blur segments are rounded down to a power of two.
         if self.scene.psychopath.motion_blur_segments > 0:
             self.time_samples = (2**int(log(self.scene.psychopath.motion_blur_segments, 2))) + 1
@@ -124,6 +128,21 @@ class PsychoExporter:
         self.w.unindent()
         self.w.write("}\n")
 
+        #------------------------------------------------------
+        # Collect materials.
+
+        # TODO: handle situations where there are more than one
+        # material with the same name.  This can happen through
+        # library linking.
+
+        for inst in self.depsgraph.object_instances:
+            ob = inst.object
+            if ob.type in ['MESH']:
+                for ms in ob.material_slots:
+                    if ms.material != None:
+                        if ms.material.name not in self.materials:
+                            self.materials[ms.material.name] = Material(self.render_engine, self.depsgraph, ms.material)
+
         #------------------------------------------------------
         # Collect world and object data.
 
@@ -133,7 +152,10 @@ class PsychoExporter:
                 if self.render_engine.test_break():
                     raise ExportCancelled()
 
-                time = self.fr + self.shutter_start + (self.shutter_diff*i)
+                subframe = self.shutter_start + (self.shutter_diff*i)
+                time = self.fr + subframe
+                self.depsgraph.scene.frame_set(self.fr, subframe=subframe)
+                self.depsgraph.update()
 
                 # Collect camera and world data.
                 self.camera.take_sample(self.render_engine, self.depsgraph, time)
@@ -152,13 +174,22 @@ class PsychoExporter:
                     # We use this a couple of times, so make a shorthand.
                     is_sun_lamp = inst.object.type == 'LIGHT' and inst.object.data.type == 'SUN'
 
+                    # TODO: handle situations where there are more than one
+                    # object with the same name.  This can happen through
+                    # library linking.
+
                     # Get a unique id for the instance.  This is surprisingly
                     # tricky, because the instance's "persistent_id" property
                     # isn't globally unique, as I would have expected from
                     # the documentation.
                     id = None
                     if inst.is_instance:
-                        id = (hash((inst.object.name, inst.parent.name)), inst.persistent_id)
+                        id = (
+                            hash((inst.object.name, inst.parent.name)),
+                            # Has to be turned into a tuple, otherwise it doesn't
+                            # work as part of the ID for some reason.
+                            tuple(inst.persistent_id),
+                        )
                     else:
                         id = inst.object.name
 
@@ -195,6 +226,30 @@ class PsychoExporter:
             self.w.write("Assembly {\n")
             self.w.indent()
 
+            # Export materials.
+            for name in self.materials:
+                self.materials[name].export(self.render_engine, self.w)
+
+            # Export objects.
+            for name in self.object_data:
+                self.object_data[name].export(self.render_engine, self.w)
+
+            # Export instances.
+            for id in self.instances:
+                [obj_name, xforms] = self.instances[id]
+                self.render_engine.update_stats("", "Psychopath: Exporting %s instance" % obj_name)
+
+                prefix = str(hex(hash(id)))
+                name = "inst_{}__{}".format(prefix, obj_name)
+
+                self.w.write("Instance {\n")
+                self.w.indent()
+                self.w.write("Data [${}]\n".format(obj_name))
+                for mat in xforms:
+                    self.w.write("Transform [{}]\n".format(mat2str(mat)))
+                self.w.unindent()
+                self.w.write("}\n")
+
             self.w.unindent()
             self.w.write("}\n")
         finally:            
diff --git a/psychoblend/world.py b/psychoblend/world.py
index 17c269b..ead824a 100644
--- a/psychoblend/world.py
+++ b/psychoblend/world.py
@@ -65,7 +65,7 @@ class Camera:
         mat = self.ob.matrix_world.copy()
         matz = Matrix()
         matz[2][2] = -1
-        self.xforms += [(mat * matz).inverted()]
+        self.xforms += [(mat @ matz).inverted()]
 
     def cleanup(self):
         pass