diff --git a/panda/src/pgraph/alphaTestAttrib.h b/panda/src/pgraph/alphaTestAttrib.h
index 96225fe902..6f460f4874 100644
--- a/panda/src/pgraph/alphaTestAttrib.h
+++ b/panda/src/pgraph/alphaTestAttrib.h
@@ -23,7 +23,7 @@ class FactoryParams;
  * Enables or disables writing of pixel to framebuffer based on its alpha
  * value relative to a reference alpha value
  */
-class EXPCL_PANDA_PGRAPH AlphaTestAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH AlphaTestAttrib final : public RenderAttrib {
 private:
   INLINE AlphaTestAttrib(PandaCompareFunc mode = M_always,
                          PN_stdfloat reference_alpha = 1.0f);
diff --git a/panda/src/pgraph/antialiasAttrib.h b/panda/src/pgraph/antialiasAttrib.h
index 454210516d..af468c9ed5 100644
--- a/panda/src/pgraph/antialiasAttrib.h
+++ b/panda/src/pgraph/antialiasAttrib.h
@@ -24,7 +24,7 @@ class FactoryParams;
  * Specifies whether or how to enable antialiasing, if supported by the
  * backend renderer.
  */
-class EXPCL_PANDA_PGRAPH AntialiasAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH AntialiasAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Mode {
     M_none        = 0x0000,
diff --git a/panda/src/pgraph/audioVolumeAttrib.h b/panda/src/pgraph/audioVolumeAttrib.h
index 564db9748e..6aae277aee 100644
--- a/panda/src/pgraph/audioVolumeAttrib.h
+++ b/panda/src/pgraph/audioVolumeAttrib.h
@@ -24,7 +24,7 @@ class FactoryParams;
 /**
  * Applies a scale to audio volume for positional sounds in the scene graph.
  */
-class EXPCL_PANDA_PGRAPH AudioVolumeAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH AudioVolumeAttrib final : public RenderAttrib {
 protected:
   AudioVolumeAttrib(bool off, PN_stdfloat volume);
   INLINE AudioVolumeAttrib(const AudioVolumeAttrib &copy);
diff --git a/panda/src/pgraph/auxBitplaneAttrib.h b/panda/src/pgraph/auxBitplaneAttrib.h
index 6283b09587..4d29e44413 100644
--- a/panda/src/pgraph/auxBitplaneAttrib.h
+++ b/panda/src/pgraph/auxBitplaneAttrib.h
@@ -46,7 +46,7 @@ class FactoryParams;
  * Otherwise, it has no effect.
  *
  */
-class EXPCL_PANDA_PGRAPH AuxBitplaneAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH AuxBitplaneAttrib final : public RenderAttrib {
 private:
   INLINE AuxBitplaneAttrib(int outputs);
 
diff --git a/panda/src/pgraph/clipPlaneAttrib.h b/panda/src/pgraph/clipPlaneAttrib.h
index 511ea34b01..14a3f90606 100644
--- a/panda/src/pgraph/clipPlaneAttrib.h
+++ b/panda/src/pgraph/clipPlaneAttrib.h
@@ -28,7 +28,7 @@
  * ClipPlaneAttrib can either add planes or remove planes from the total set
  * of clipping planes in effect.
  */
-class EXPCL_PANDA_PGRAPH ClipPlaneAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH ClipPlaneAttrib final : public RenderAttrib {
 private:
   INLINE ClipPlaneAttrib();
   INLINE ClipPlaneAttrib(const ClipPlaneAttrib &copy);
diff --git a/panda/src/pgraph/colorAttrib.h b/panda/src/pgraph/colorAttrib.h
index b652233a62..872d1686eb 100644
--- a/panda/src/pgraph/colorAttrib.h
+++ b/panda/src/pgraph/colorAttrib.h
@@ -24,7 +24,7 @@ class FactoryParams;
 /**
  * Indicates what color should be applied to renderable geometry.
  */
-class EXPCL_PANDA_PGRAPH ColorAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH ColorAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Type {
     T_vertex, T_flat, T_off
diff --git a/panda/src/pgraph/colorBlendAttrib.h b/panda/src/pgraph/colorBlendAttrib.h
index 87b680425f..4aefea44eb 100644
--- a/panda/src/pgraph/colorBlendAttrib.h
+++ b/panda/src/pgraph/colorBlendAttrib.h
@@ -24,7 +24,7 @@ class FactoryParams;
  * This specifies how colors are blended into the frame buffer, for special
  * effects.  This overrides transparency if transparency is also specified.
  */
-class EXPCL_PANDA_PGRAPH ColorBlendAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH ColorBlendAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Mode {
     M_none,             // Blending is disabled
diff --git a/panda/src/pgraph/colorScaleAttrib.h b/panda/src/pgraph/colorScaleAttrib.h
index 918bbe9874..1b75f6ca14 100644
--- a/panda/src/pgraph/colorScaleAttrib.h
+++ b/panda/src/pgraph/colorScaleAttrib.h
@@ -24,7 +24,7 @@ class FactoryParams;
 /**
  * Applies a scale to colors in the scene graph and on vertices.
  */
-class EXPCL_PANDA_PGRAPH ColorScaleAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH ColorScaleAttrib final : public RenderAttrib {
 protected:
   ColorScaleAttrib(bool off, const LVecBase4 &scale);
   INLINE ColorScaleAttrib(const ColorScaleAttrib &copy);
diff --git a/panda/src/pgraph/colorWriteAttrib.h b/panda/src/pgraph/colorWriteAttrib.h
index 02d4fd2ca9..381f65c33a 100644
--- a/panda/src/pgraph/colorWriteAttrib.h
+++ b/panda/src/pgraph/colorWriteAttrib.h
@@ -25,7 +25,7 @@ class FactoryParams;
  * for certain special effects in which it is important to write to the depth
  * buffer without affecting the color buffer.
  */
-class EXPCL_PANDA_PGRAPH ColorWriteAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH ColorWriteAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Channels {
     // By coincidence, these bits are the same as those for
diff --git a/panda/src/pgraph/cullBinAttrib.h b/panda/src/pgraph/cullBinAttrib.h
index 1104f21af7..c9767c3938 100644
--- a/panda/src/pgraph/cullBinAttrib.h
+++ b/panda/src/pgraph/cullBinAttrib.h
@@ -24,7 +24,7 @@ class FactoryParams;
  * Assigns geometry to a particular bin by name.  The bins must be created
  * separately via the CullBinManager interface.
  */
-class EXPCL_PANDA_PGRAPH CullBinAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH CullBinAttrib final : public RenderAttrib {
 private:
   INLINE CullBinAttrib();
 
diff --git a/panda/src/pgraph/cullFaceAttrib.h b/panda/src/pgraph/cullFaceAttrib.h
index def2216976..1a93f19638 100644
--- a/panda/src/pgraph/cullFaceAttrib.h
+++ b/panda/src/pgraph/cullFaceAttrib.h
@@ -23,7 +23,7 @@ class FactoryParams;
 /**
  * Indicates which faces should be culled based on their vertex ordering.
  */
-class EXPCL_PANDA_PGRAPH CullFaceAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH CullFaceAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Mode {
     M_cull_none,                // Cull no polygons
diff --git a/panda/src/pgraph/depthBiasAttrib.h b/panda/src/pgraph/depthBiasAttrib.h
index fea972bd81..1a20b85846 100644
--- a/panda/src/pgraph/depthBiasAttrib.h
+++ b/panda/src/pgraph/depthBiasAttrib.h
@@ -40,7 +40,7 @@ class FactoryParams;
  *
  * @since 1.11.0
  */
-class EXPCL_PANDA_PGRAPH DepthBiasAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH DepthBiasAttrib final : public RenderAttrib {
 private:
   INLINE DepthBiasAttrib(PN_stdfloat slope_factor, PN_stdfloat constant_factor,
                          PN_stdfloat clamp = 0);
diff --git a/panda/src/pgraph/depthOffsetAttrib.h b/panda/src/pgraph/depthOffsetAttrib.h
index 6f868cec88..aa1739e72a 100644
--- a/panda/src/pgraph/depthOffsetAttrib.h
+++ b/panda/src/pgraph/depthOffsetAttrib.h
@@ -49,7 +49,7 @@ class FactoryParams;
  *
  * @deprecated See DepthBiasAttrib and DisplayRegion::set_depth_range() instead.
  */
-class EXPCL_PANDA_PGRAPH DepthOffsetAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH DepthOffsetAttrib final : public RenderAttrib {
 private:
   INLINE DepthOffsetAttrib(int offset, PN_stdfloat min_value, PN_stdfloat max_value);
 
diff --git a/panda/src/pgraph/depthTestAttrib.h b/panda/src/pgraph/depthTestAttrib.h
index f4d6c52352..6e148383e7 100644
--- a/panda/src/pgraph/depthTestAttrib.h
+++ b/panda/src/pgraph/depthTestAttrib.h
@@ -23,7 +23,7 @@ class FactoryParams;
 /**
  * Enables or disables writing to the depth buffer.
  */
-class EXPCL_PANDA_PGRAPH DepthTestAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH DepthTestAttrib final : public RenderAttrib {
 private:
   INLINE DepthTestAttrib(PandaCompareFunc mode = M_less);
 
diff --git a/panda/src/pgraph/depthWriteAttrib.h b/panda/src/pgraph/depthWriteAttrib.h
index 50e31e764d..bb02b4336c 100644
--- a/panda/src/pgraph/depthWriteAttrib.h
+++ b/panda/src/pgraph/depthWriteAttrib.h
@@ -23,7 +23,7 @@ class FactoryParams;
 /**
  * Enables or disables writing to the depth buffer.
  */
-class EXPCL_PANDA_PGRAPH DepthWriteAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH DepthWriteAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Mode {
     M_off,
diff --git a/panda/src/pgraph/fogAttrib.h b/panda/src/pgraph/fogAttrib.h
index 8dac86fd6a..e513aacf0c 100644
--- a/panda/src/pgraph/fogAttrib.h
+++ b/panda/src/pgraph/fogAttrib.h
@@ -22,7 +22,7 @@
 /**
  * Applies a Fog to the geometry at and below this node.
  */
-class EXPCL_PANDA_PGRAPH FogAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH FogAttrib final : public RenderAttrib {
 private:
   INLINE FogAttrib();
 
diff --git a/panda/src/pgraph/lightAttrib.h b/panda/src/pgraph/lightAttrib.h
index 361a4a6c1e..963fffa49a 100644
--- a/panda/src/pgraph/lightAttrib.h
+++ b/panda/src/pgraph/lightAttrib.h
@@ -27,7 +27,7 @@
  * geometry at this level and below.  A LightAttrib can either add lights or
  * remove lights from the total set of "on" lights.
  */
-class EXPCL_PANDA_PGRAPH LightAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH LightAttrib final : public RenderAttrib {
 protected:
   INLINE LightAttrib();
   LightAttrib(const LightAttrib &copy);
diff --git a/panda/src/pgraph/lightRampAttrib.h b/panda/src/pgraph/lightRampAttrib.h
index d6859676bf..12b3711892 100644
--- a/panda/src/pgraph/lightRampAttrib.h
+++ b/panda/src/pgraph/lightRampAttrib.h
@@ -25,7 +25,7 @@ class FactoryParams;
  * a kind of light ramp.  So is HDR tone mapping.  So is cartoon shading.  See
  * the constructors for an explanation of each kind of ramp.
  */
-class EXPCL_PANDA_PGRAPH LightRampAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH LightRampAttrib final : public RenderAttrib {
 private:
   INLINE LightRampAttrib();
 
diff --git a/panda/src/pgraph/logicOpAttrib.h b/panda/src/pgraph/logicOpAttrib.h
index 7d6b0f5b6e..86bf48b530 100644
--- a/panda/src/pgraph/logicOpAttrib.h
+++ b/panda/src/pgraph/logicOpAttrib.h
@@ -27,7 +27,7 @@ class FactoryParams;
  *
  * @since 1.10.0
  */
-class EXPCL_PANDA_PGRAPH LogicOpAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH LogicOpAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Operation {
     O_none,  // LogicOp disabled, regular blending occurs.
diff --git a/panda/src/pgraph/materialAttrib.h b/panda/src/pgraph/materialAttrib.h
index 0e65498d70..9b2aa718eb 100644
--- a/panda/src/pgraph/materialAttrib.h
+++ b/panda/src/pgraph/materialAttrib.h
@@ -24,7 +24,7 @@
  * material is used primarily to control lighting effects, and isn't necessary
  * (or useful) in the absence of lighting.
  */
-class EXPCL_PANDA_PGRAPH MaterialAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH MaterialAttrib final : public RenderAttrib {
 private:
   INLINE MaterialAttrib();
 
diff --git a/panda/src/pgraph/renderModeAttrib.h b/panda/src/pgraph/renderModeAttrib.h
index 9684ee5176..3a1d993efc 100644
--- a/panda/src/pgraph/renderModeAttrib.h
+++ b/panda/src/pgraph/renderModeAttrib.h
@@ -24,7 +24,7 @@ class FactoryParams;
 /**
  * Specifies how polygons are to be drawn.
  */
-class EXPCL_PANDA_PGRAPH RenderModeAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH RenderModeAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Mode {
     M_unchanged,
diff --git a/panda/src/pgraph/rescaleNormalAttrib.h b/panda/src/pgraph/rescaleNormalAttrib.h
index 7f87219285..d3a7df3d1c 100644
--- a/panda/src/pgraph/rescaleNormalAttrib.h
+++ b/panda/src/pgraph/rescaleNormalAttrib.h
@@ -23,7 +23,7 @@ class FactoryParams;
 /**
  * Specifies how polygons are to be drawn.
  */
-class EXPCL_PANDA_PGRAPH RescaleNormalAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH RescaleNormalAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Mode {
     // No adjustments are made to normals.
diff --git a/panda/src/pgraph/scissorAttrib.h b/panda/src/pgraph/scissorAttrib.h
index c7c3ff3c4e..6c2c872672 100644
--- a/panda/src/pgraph/scissorAttrib.h
+++ b/panda/src/pgraph/scissorAttrib.h
@@ -33,7 +33,7 @@ class FactoryParams;
  * See ScissorEffect if you wish to define a region relative to 2-D or 3-D
  * coordinates in the scene graph, with culling.
  */
-class EXPCL_PANDA_PGRAPH ScissorAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH ScissorAttrib final : public RenderAttrib {
 private:
   ScissorAttrib(const LVecBase4 &frame);
 
diff --git a/panda/src/pgraph/shadeModelAttrib.h b/panda/src/pgraph/shadeModelAttrib.h
index c5e0819141..40add922c2 100644
--- a/panda/src/pgraph/shadeModelAttrib.h
+++ b/panda/src/pgraph/shadeModelAttrib.h
@@ -24,7 +24,7 @@ class FactoryParams;
  * Specifies whether flat shading (per-polygon) or smooth shading (per-vertex)
  * is in effect.
  */
-class EXPCL_PANDA_PGRAPH ShadeModelAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH ShadeModelAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Mode {
     M_flat,
diff --git a/panda/src/pgraph/shaderAttrib.h b/panda/src/pgraph/shaderAttrib.h
index 6552fdf385..cdc8a9b65f 100644
--- a/panda/src/pgraph/shaderAttrib.h
+++ b/panda/src/pgraph/shaderAttrib.h
@@ -36,7 +36,7 @@
 /**
  *
  */
-class EXPCL_PANDA_PGRAPH ShaderAttrib: public RenderAttrib {
+class EXPCL_PANDA_PGRAPH ShaderAttrib final : public RenderAttrib {
 private:
   INLINE ShaderAttrib();
   INLINE ShaderAttrib(const ShaderAttrib &copy);
diff --git a/panda/src/pgraph/stencilAttrib.h b/panda/src/pgraph/stencilAttrib.h
index ffc205179c..df28be5dfb 100644
--- a/panda/src/pgraph/stencilAttrib.h
+++ b/panda/src/pgraph/stencilAttrib.h
@@ -25,7 +25,7 @@ class FactoryParams;
  * make or make_2_sided.  To determine if two sided stencil is supported, call
  * the function GraphicsStateGuardian:: get_supports_two_sided_stencil.
  */
-class EXPCL_PANDA_PGRAPH StencilAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH StencilAttrib final : public RenderAttrib {
 
 private:
   StencilAttrib();
diff --git a/panda/src/pgraph/texGenAttrib.h b/panda/src/pgraph/texGenAttrib.h
index 0bd9e463e8..3966dbb8cf 100644
--- a/panda/src/pgraph/texGenAttrib.h
+++ b/panda/src/pgraph/texGenAttrib.h
@@ -29,7 +29,7 @@
  * refraction maps, for instance to make shiny surfaces, as well as other
  * special effects such as projective texturing.
  */
-class EXPCL_PANDA_PGRAPH TexGenAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH TexGenAttrib final : public RenderAttrib {
 PUBLISHED:
   // We inherit the definition of our Mode enumerated type from RenderAttrib.
   // Normally, Mode would be defined here, but we define it in the base class
diff --git a/panda/src/pgraph/texMatrixAttrib.h b/panda/src/pgraph/texMatrixAttrib.h
index 28034a5afa..4fbfec4db8 100644
--- a/panda/src/pgraph/texMatrixAttrib.h
+++ b/panda/src/pgraph/texMatrixAttrib.h
@@ -27,7 +27,7 @@ class FactoryParams;
 /**
  * Applies a transform matrix to UV's before they are rendered.
  */
-class EXPCL_PANDA_PGRAPH TexMatrixAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH TexMatrixAttrib final : public RenderAttrib {
 protected:
   INLINE TexMatrixAttrib();
   INLINE TexMatrixAttrib(const TexMatrixAttrib &copy);
diff --git a/panda/src/pgraph/textureAttrib.h b/panda/src/pgraph/textureAttrib.h
index 48c61fa86f..5625237bb2 100644
--- a/panda/src/pgraph/textureAttrib.h
+++ b/panda/src/pgraph/textureAttrib.h
@@ -29,7 +29,7 @@
  * Indicates the set of TextureStages and their associated Textures that
  * should be applied to (or removed from) a node.
  */
-class EXPCL_PANDA_PGRAPH TextureAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH TextureAttrib final : public RenderAttrib {
 protected:
   INLINE TextureAttrib();
   INLINE TextureAttrib(const TextureAttrib &copy);
diff --git a/panda/src/pgraph/transparencyAttrib.h b/panda/src/pgraph/transparencyAttrib.h
index 4021697596..a888c70f68 100644
--- a/panda/src/pgraph/transparencyAttrib.h
+++ b/panda/src/pgraph/transparencyAttrib.h
@@ -28,7 +28,7 @@ class FactoryParams;
  * effect unless you actually want it to be at least partially transparent
  * (and it has alpha components less than 1).
  */
-class EXPCL_PANDA_PGRAPH TransparencyAttrib : public RenderAttrib {
+class EXPCL_PANDA_PGRAPH TransparencyAttrib final : public RenderAttrib {
 PUBLISHED:
   enum Mode {
     // The first two should be specifically 0 and 1, for historical reasons