diff --git a/code/math/Math.h b/code/math/Math.h
index 5f4247f..0c7143c 100644
--- a/code/math/Math.h
+++ b/code/math/Math.h
@@ -668,6 +668,8 @@ class Plane
 	// Returns 1, 2, or 1 + 2
 	int testBounds(Bounds bounds);
 
+	vec4 toVec4() const { return vec4(normal, distance); }
+
 	vec3 normal;
 	float distance;
 
diff --git a/code/renderer_bgfx/Main.cpp b/code/renderer_bgfx/Main.cpp
index 6dbb39a..d11f426 100644
--- a/code/renderer_bgfx/Main.cpp
+++ b/code/renderer_bgfx/Main.cpp
@@ -932,7 +932,7 @@ static void SetDrawCallGeometry(const DrawCall &dc)
 	}
 }
 
-void Main::renderCamera(uint8_t visCacheId, vec3 pvsPosition, vec3 position, mat3 rotation, Rect rect, vec2 fov, const uint8_t *areaMask, vec4 clippingPlane, int flags)
+void Main::renderCamera(uint8_t visCacheId, vec3 pvsPosition, vec3 position, mat3 rotation, Rect rect, vec2 fov, const uint8_t *areaMask, Plane clippingPlane, int flags)
 {
 	assert(areaMask);
 	const float zMin = 4;
@@ -962,7 +962,7 @@ void Main::renderCamera(uint8_t visCacheId, vec3 pvsPosition, vec3 position, mat
 		if (g_cvars.waterReflections.getBool())
 		{
 			Transform reflectionCamera;
-			vec4 reflectionPlane;
+			Plane reflectionPlane;
 
 			if (world::CalculateReflectionCamera(visCacheId, position, rotation, vpMatrix, &reflectionCamera, &reflectionPlane))
 			{
@@ -987,7 +987,7 @@ void Main::renderCamera(uint8_t visCacheId, vec3 pvsPosition, vec3 position, mat
 		// Render a portal camera if there's a portal surface visible.
 		vec3 pvsPosition;
 		Transform portalCamera;
-		vec4 portalPlane;
+		Plane portalPlane;
 		bool isCameraMirrored;
 
 		if (world::CalculatePortalCamera(visCacheId, position, rotation, vpMatrix, sceneEntities_, &pvsPosition, &portalCamera, &isCameraMirrored, &portalPlane))
@@ -1040,7 +1040,7 @@ void Main::renderCamera(uint8_t visCacheId, vec3 pvsPosition, vec3 position, mat
 	if (flags & RenderCameraFlags::UseClippingPlane)
 	{
 		uniforms_->portalClip.set(vec4(1, 0, 0, 0));
-		uniforms_->portalPlane.set(clippingPlane);
+		uniforms_->portalPlane.set(clippingPlane.toVec4());
 	}
 	else
 	{
diff --git a/code/renderer_bgfx/Main.h b/code/renderer_bgfx/Main.h
index aaac701..9fd68ad 100644
--- a/code/renderer_bgfx/Main.h
+++ b/code/renderer_bgfx/Main.h
@@ -165,7 +165,7 @@ class Main
 	void debugDraw(bgfx::TextureHandle texture, int x = 0, int y = 0, ShaderProgramId::Enum program = ShaderProgramId::Texture);
 	uint8_t pushView(const FrameBuffer &frameBuffer, uint16_t clearFlags, const mat4 &viewMatrix, const mat4 &projectionMatrix, Rect rect, int flags = 0);
 	void flushStretchPics();
-	void renderCamera(uint8_t visCacheId, vec3 pvsPosition, vec3 position, mat3 rotation, Rect rect, vec2 fov, const uint8_t *areaMask, vec4 clippingPlane = vec4::empty, int flags = 0);
+	void renderCamera(uint8_t visCacheId, vec3 pvsPosition, vec3 position, mat3 rotation, Rect rect, vec2 fov, const uint8_t *areaMask, Plane clippingPlane = Plane(), int flags = 0);
 	void renderPolygons();
 	void renderScreenSpaceQuad(const FrameBuffer &frameBuffer, ShaderProgramId::Enum program, uint64_t state, uint16_t clearFlags = BGFX_CLEAR_NONE, bool originBottomLeft = false, Rect rect = Rect());
 	void renderToStencil(const uint8_t viewId);
diff --git a/code/renderer_bgfx/Precompiled.h b/code/renderer_bgfx/Precompiled.h
index e8c82ef..a4fd7a4 100644
--- a/code/renderer_bgfx/Precompiled.h
+++ b/code/renderer_bgfx/Precompiled.h
@@ -1571,8 +1571,8 @@ namespace world
 	Bounds GetBounds(uint8_t visCacheId);
 	size_t GetNumSkies(uint8_t visCacheId);
 	void GetSky(uint8_t visCacheId, size_t index, Material **material, const std::vector<Vertex> **vertices);
-	bool CalculatePortalCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, const std::vector<Entity> &entities, vec3 *pvsPosition, Transform *portalCamera, bool *isMirror, vec4 *portalPlane);
-	bool CalculateReflectionCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, Transform *camera, vec4 *plane);
+	bool CalculatePortalCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, const std::vector<Entity> &entities, vec3 *pvsPosition, Transform *portalCamera, bool *isMirror, Plane *portalPlane);
+	bool CalculateReflectionCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, Transform *camera, Plane *plane);
 	void RenderPortal(uint8_t visCacheId, DrawCallList *drawCallList);
 	void RenderReflective(uint8_t visCacheId, DrawCallList *drawCallList);
 	uint8_t CreateVisCache();
diff --git a/code/renderer_bgfx/World.cpp b/code/renderer_bgfx/World.cpp
index 501a7a9..cadc60c 100644
--- a/code/renderer_bgfx/World.cpp
+++ b/code/renderer_bgfx/World.cpp
@@ -777,7 +777,7 @@ class World
 		}
 	}
 
-	bool calculatePortalCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, const std::vector<Entity> &entities, vec3 *pvsPosition, Transform *portalCamera, bool *isMirror, vec4 *portalPlane) const
+	bool calculatePortalCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, const std::vector<Entity> &entities, vec3 *pvsPosition, Transform *portalCamera, bool *isMirror, Plane *portalPlane) const
 	{
 		assert(pvsPosition);
 		assert(portalCamera);
@@ -927,11 +927,11 @@ class World
 		portalCamera->rotation[1] = MirroredVector(mainCameraRotation[1], surfaceTransform, cameraTransform);
 		portalCamera->rotation[2] = MirroredVector(mainCameraRotation[2], surfaceTransform, cameraTransform);
 		*isMirror = portal.isMirror;
-		*portalPlane = vec4(-cameraTransform.rotation[0], vec3::dotProduct(cameraTransform.position, -cameraTransform.rotation[0]));
+		*portalPlane = Plane(-cameraTransform.rotation[0], vec3::dotProduct(cameraTransform.position, -cameraTransform.rotation[0]));
 		return true;
 	}
 
-	bool calculateReflectionCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, Transform *camera, vec4 *plane)
+	bool calculateReflectionCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, Transform *camera, Plane *plane)
 	{
 		assert(camera);
 		assert(plane);
@@ -988,7 +988,7 @@ class World
 		camera->rotation[0] = MirroredVector(mainCameraRotation[0], surfaceTransform, cameraTransform);
 		camera->rotation[1] = MirroredVector(mainCameraRotation[1], surfaceTransform, cameraTransform);
 		camera->rotation[2] = MirroredVector(mainCameraRotation[2], surfaceTransform, cameraTransform);
-		*plane = vec4(-cameraTransform.rotation[0], vec3::dotProduct(cameraTransform.position, -cameraTransform.rotation[0]));
+		*plane = Plane(-cameraTransform.rotation[0], vec3::dotProduct(cameraTransform.position, -cameraTransform.rotation[0]));
 		return true;
 	}
 
@@ -2459,13 +2459,13 @@ void GetSky(uint8_t visCacheId, size_t index, Material **material, const std::ve
 	s_world->getSky(visCacheId, index, material, vertices);
 }
 
-bool CalculatePortalCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, const std::vector<Entity> &entities, vec3 *pvsPosition, Transform *portalCamera, bool *isMirror, vec4 *portalPlane)
+bool CalculatePortalCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, const std::vector<Entity> &entities, vec3 *pvsPosition, Transform *portalCamera, bool *isMirror, Plane *portalPlane)
 {
 	assert(IsLoaded());
 	return s_world->calculatePortalCamera(visCacheId, mainCameraPosition, mainCameraRotation, mvp, entities, pvsPosition, portalCamera, isMirror, portalPlane);
 }
 
-bool CalculateReflectionCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, Transform *camera, vec4 *plane)
+bool CalculateReflectionCamera(uint8_t visCacheId, vec3 mainCameraPosition, mat3 mainCameraRotation, const mat4 &mvp, Transform *camera, Plane *plane)
 {
 	assert(IsLoaded());
 	return s_world->calculateReflectionCamera(visCacheId, mainCameraPosition, mainCameraRotation, mvp, camera, plane);