diff --git a/graphics/materialx/Makefile b/graphics/materialx/Makefile
index 84828d5a9633..b2d422aa60f5 100644
--- a/graphics/materialx/Makefile
+++ b/graphics/materialx/Makefile
@@ -1,78 +1,80 @@
 PORTNAME=	materialx
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.39.4
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	graphics
 
 MAINTAINER=	freebsd@sysctl.cz
 COMMENT=	MaterialX is an open standard for the exchange of rich material
 WWW=		http://www.materialx.org/
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	libglvnd>0:graphics/libglvnd \
 		openimageio>0:graphics/openimageio \
 		openshadinglanguage>0:graphics/openshadinglanguage
 LIB_DEPENDS=	libImath.so:math/Imath \
+		libOpenColorIO.so:graphics/opencolorio \
 		libOpenImageIO.so:graphics/openimageio \
 		libOpenImageIO_Util.so:graphics/openimageio
 
 USES=		cmake gl localbase python:3.9+ xorg
 USE_GITHUB=	yes
 GH_ACCOUNT=	AcademySoftwareFoundation
 GH_PROJECT=	MaterialX
 GH_TUPLE=	mitsuba-renderer:nanogui:6452dd6:nanogui/source/MaterialXView/NanoGUI \
 		ocornut:imgui:9aae45e:imgui/source/MaterialXGraphEditor/External/ImGui \
 		thedmd:imgui-node-editor:2f99b2d:nodeeditor/source/MaterialXGraphEditor/External/ImGuiNodeEditor \
 		wjakob:glfw:e130e55:glfw/source/MaterialXView/NanoGUI/ext/glfw \
 		wjakob:nanobind:e504eeb:nanobind/source/MaterialXView/NanoGUI/ext/nanobind \
 		wjakob:nanovg:bf2320d:nanovg/source/MaterialXView/NanoGUI/ext/nanovg \
 		wjakob:nanovg_metal:075b04f:nanovgmetal/source/MaterialXView/NanoGUI/ext/nanovg_metal
 
 USE_GL=		opengl
 USE_LDCONFIG=	yes
 USE_XORG=	ice sm x11 xt
 
 CMAKE_ARGS=	-DCMAKE_INSTALL_PREFIX=${STAGEDIR}${PREFIX} \
 		-DNANOGUI_NATIVE_FLAGS="" \
 		-DMATERIALX_INSTALL_RESOURCES=${PREFIX}/share/MaterialX \
 		-DMATERIALX_INSTALL_PYTHON=${PREFIX}${PYTHONPREFIX_SITELIBDIR}/MaterialX
 
 CMAKE_ON=	MATERIALX_BUILD_GRAPH_EDITOR \
+		MATERIALX_BUILD_OCIO \
 		MATERIALX_BUILD_OIIO \
 		MATERIALX_BUILD_PYTHON \
 		MATERIALX_BUILD_SHARED_LIBS \
 		MATERIALX_BUILD_TESTS \
 		MATERIALX_BUILD_VIEWER
 post-patch:
 	${REINPLACE_CMD} 's|%%PREFIX%%|${PREFIX}|' \
 		${WRKSRC}/cmake/modules/MaterialXConfig.cmake.in
 
 do-install:
 	${INSTALL_PROGRAM} ${WRKDIR}/.build/bin/MaterialXGraphEditor \
 		${WRKDIR}/.build/bin/MaterialXView ${STAGEDIR}${PREFIX}/bin
 	${INSTALL_LIB} ${BUILD_WRKSRC}/lib/*.so* ${STAGEDIR}${PREFIX}/lib
 	(cd ${WRKSRC}/resources && ${COPYTREE_SHARE} . \
 		${STAGEDIR}${PREFIX}/share/MaterialX)
 	(cd ${WRKSRC}/source && ${COPYTREE_SHARE} . \
 		${STAGEDIR}${PREFIX}/include "-name *.h")
 	${INSTALL_DATA} ${BUILD_WRKSRC}/source/MaterialXCore/Generated.h \
 		${STAGEDIR}${PREFIX}/include/MaterialXCore
 	${INSTALL_DATA} ${WRKSRC}/source/MaterialXRender/TextureBaker.inl \
 		${STAGEDIR}${PREFIX}/include/MaterialXRender
 	(cd ${WRKSRC}/python/Scripts && ${COPYTREE_SHARE} . \
 		${STAGEDIR}${PREFIX}/share/MaterialX/examples)
 	(cd ${WRKSRC}/python/MaterialX && ${COPYTREE_SHARE} . \
 		${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}/MaterialX)
 	(cd ${WRKSRC}/libraries && ${COPYTREE_SHARE} . \
 		${STAGEDIR}${PREFIX}/share/MaterialX/stdlib "-name *.mtlx")
 	${MKDIR} ${STAGEDIR}${PREFIX}/lib/cmake/MaterialX
 	${INSTALL_DATA} ${WRKDIR}/.build/cmake/*.cmake \
 		${BUILD_WRKSRC}/CMakeFiles/Export/6ec30f313a190b6699aad53a4a5af714/MaterialXTargets.cmake \
 		${STAGEDIR}${PREFIX}/lib/cmake/MaterialX
 
 do-test:
 	cd ${TEST_WRKSRC} && ctest -C ${CMAKE_BUILD_TYPE} ${_MAKE_JOBS}
 
 .include <bsd.port.mk>
diff --git a/graphics/materialx/files/patch-source_MaterialXGraphEditor_RenderView.cpp b/graphics/materialx/files/patch-source_MaterialXGraphEditor_RenderView.cpp
new file mode 100644
index 000000000000..69085f58c4b6
--- /dev/null
+++ b/graphics/materialx/files/patch-source_MaterialXGraphEditor_RenderView.cpp
@@ -0,0 +1,12 @@
+--- source/MaterialXGraphEditor/RenderView.cpp.orig	2025-09-15 18:12:11 UTC
++++ source/MaterialXGraphEditor/RenderView.cpp
+@@ -16,6 +16,9 @@
+ #include <MaterialXRender/TinyObjLoader.h>
+ 
+ #include <MaterialXGenShader/DefaultColorManagementSystem.h>
++#ifdef MATERIALX_BUILD_OCIO
++#include <MaterialXGenShader/OcioColorManagementSystem.h>
++#endif
+ 
+ #include <MaterialXFormat/Util.h>
+