diff --git a/korman/exporter/material.py b/korman/exporter/material.py
index d189a5e..997bbc1 100644
--- a/korman/exporter/material.py
+++ b/korman/exporter/material.py
@@ -19,7 +19,7 @@ import math
 import mathutils
 from pathlib import Path
 from PyHSPlasma import *
-from typing import Union
+from typing import Sequence, Union
 import weakref
 
 from .explosions import *
@@ -1183,7 +1183,7 @@ class MaterialConverter:
                 data[i] = level_data
         return numLevels, eWidth, eHeight, [data,]
 
-    def get_materials(self, bo):
+    def get_materials(self, bo) -> Sequence[plKey]:
         return self._obj2mat.get(bo, [])
 
     def get_base_layer(self, hsgmat):
diff --git a/korman/nodes/node_python.py b/korman/nodes/node_python.py
index c758b3e..9ece289 100644
--- a/korman/nodes/node_python.py
+++ b/korman/nodes/node_python.py
@@ -283,7 +283,7 @@ class PlasmaPythonFileNode(PlasmaVersionedNode, bpy.types.Node):
             from_node = socket.links[0].from_node
 
             value = from_node.value if socket.is_simple_value else from_node.get_key(exporter, so)
-            if not isinstance(value, tuple):
+            if not isinstance(value, (tuple, list)):
                 value = (value,)
             for i in value:
                 param = plPythonParameter()
@@ -723,7 +723,7 @@ class PlasmaAttribObjectNode(idprops.IDPropObjectMixin, PlasmaAttribNodeBase, bp
     bl_label = "Object Attribute"
 
     pl_attrib = ("ptAttribSceneobject", "ptAttribSceneobjectList", "ptAttribAnimation",
-                 "ptAttribSwimCurrent", "ptAttribWaveSet")
+                 "ptAttribSwimCurrent", "ptAttribWaveSet", "ptAttribGrassShader")
 
     target_object = PointerProperty(name="Object",
                                     description="Object containing the required data",
@@ -765,6 +765,15 @@ class PlasmaAttribObjectNode(idprops.IDPropObjectMixin, PlasmaAttribNodeBase, bp
             if not waveset.enabled:
                 self.raise_error("water modifier not enabled on '{}'".format(self.object_name))
             return exporter.mgr.find_create_key(plWaveSet7, so=ref_so, bl=bo)
+        elif attrib == "ptAttribGrassShader":
+            grass_shader = bo.plasma_modifiers.grass_shader
+            if not grass_shader.enabled:
+                self.raise_error("grass shader modifier not enabled on '{}'".format(self.object_name))
+            if exporter.mgr.getVer() <= pvPots:
+                return None
+            return [exporter.mgr.find_create_key(plGrassShaderMod, so=ref_so, name=i.name)
+                    for i in exporter.mesh.material.get_materials(bo)]
+
 
     @classmethod
     def _idprop_mapping(cls):
diff --git a/korman/properties/modifiers/render.py b/korman/properties/modifiers/render.py
index 3683039..1b7eea8 100644
--- a/korman/properties/modifiers/render.py
+++ b/korman/properties/modifiers/render.py
@@ -321,6 +321,75 @@ class PlasmaFollowMod(idprops.IDPropObjectMixin, PlasmaModifierProperties):
         return True
 
 
+class PlasmaGrassWave(bpy.types.PropertyGroup):
+    distance = FloatVectorProperty(name="Distance",
+                                   size=3,
+                                   default=(0.2, 0.2, 0.1),
+                                   subtype="XYZ",
+                                   unit="LENGTH",
+                                   options=set())
+    direction = FloatVectorProperty(name="Direction",
+                                    size=2,
+                                    default=(0.2, 0.05),
+                                    soft_min=0.0, soft_max=1.0,
+                                    unit="LENGTH",
+                                    subtype="XYZ",
+                                    options=set())
+    speed = FloatProperty(name="Speed",
+                          default=0.1,
+                          unit="VELOCITY",
+                          options=set())
+
+
+class PlasmaGrassShaderMod(PlasmaModifierProperties):
+    pl_id = "grass_shader"
+
+    bl_category = "Render"
+    bl_label = "Grass Shader"
+    bl_description = "Applies waving grass effect at run-time"
+
+    wave1 = PointerProperty(type=PlasmaGrassWave)
+    wave2 = PointerProperty(type=PlasmaGrassWave)
+    wave3 = PointerProperty(type=PlasmaGrassWave)
+    wave4 = PointerProperty(type=PlasmaGrassWave)
+
+    # UI Accessor
+    wave_selector = EnumProperty(items=[("wave1", "Wave 1", ""),
+                                        ("wave2", "Wave 2", ""),
+                                        ("wave3", "Wave 3", ""),
+                                        ("wave4", "Wave 4", "")],
+                                 name="Waves",
+                                 options=set())
+
+    @property
+    def copy_material(self):
+        return True
+
+    def export(self, exporter, bo, so):
+        if exporter.mgr.getVer() <= pvPots:
+            exporter.report.warning("Not supported on this version of Plasma", indent=3)
+            return
+        else:
+            exporter.report.port("This will only function on MOUL and EOA", indent=3)
+
+        materials = exporter.mesh.material.get_materials(bo)
+        if not materials:
+            exporter.report.warning("No materials are associated with this object, no grass shader exported!",
+                                    indent=3)
+            return
+        elif len(materials) > 1:
+            exporter.report.warning("Ah, a multiple material grass shader, eh. You like living dangerously...",
+                                    indent=3)
+
+        for material in materials:
+            mod = exporter.mgr.find_create_object(plGrassShaderMod, so=so, name=material.name)
+            mod.material = material
+            for mod_wave, settings in zip(mod.waves, (self.wave1, self.wave2, self.wave3, self.wave4)):
+                mod_wave.dist = hsVector3(*settings.distance)
+                mod_wave.dirX, mod_wave.dirY = settings.direction
+                mod_wave.speed = settings.speed
+
+
 class PlasmaLightMapGen(idprops.IDPropMixin, PlasmaModifierProperties, PlasmaModifierUpgradable):
     pl_id = "lightmap"
 
diff --git a/korman/ui/modifiers/render.py b/korman/ui/modifiers/render.py
index 7c6dfa6..6df9fe7 100644
--- a/korman/ui/modifiers/render.py
+++ b/korman/ui/modifiers/render.py
@@ -127,6 +127,21 @@ def followmod(modifier, layout, context):
     if modifier.leader_type == "kFollowObject":
         layout.prop(modifier, "leader", icon="OUTLINER_OB_MESH")
 
+def grass_shader(modifier, layout, context):
+    layout.prop(modifier, "wave_selector", icon="SMOOTHCURVE")
+    layout.separator()
+
+    wave = getattr(modifier, modifier.wave_selector)
+    box = layout.box()
+    split = box.split()
+    col = split.column()
+    col.label("Distortion:")
+    col.prop(wave, "distance", text="")
+    col = split.column()
+    col.label("Direction:")
+    col.prop(wave, "direction", text="")
+    box.prop(wave, "speed")
+
 def lighting(modifier, layout, context):
     split = layout.split()
     col = split.column()