diff -Naur old/blender-2.83.4.ebuild new/blender-2.83.4.ebuild
--- old/blender-2.83.4.ebuild	2020-09-10 21:37:52.945894727 -0400
+++ new/blender-2.83.4.ebuild	2020-09-10 21:39:06.336931837 -0400
@@ -24,7 +24,7 @@
 	abi6-compat abi7-compat alembic collada color-management cuda cycles \
 	debug doc ffmpeg fftw headless jack jemalloc jpeg2k llvm \
 	man ndof nls openal opencl openimageio openmp opensubdiv \
-	openvdb osl sdl sndfile standalone test tiff valgrind"
+	openvdb optix osl sdl sndfile standalone test tiff valgrind"
 RESTRICT="!test? ( test )"
 
 REQUIRED_USE="${PYTHON_REQUIRED_USE}
@@ -33,6 +33,7 @@
 	cycles? ( openexr tiff openimageio )
 	elbeem? ( tbb )
 	opencl? ( cycles )
+	optix? ( cycles )
 	openvdb? (
 		^^ ( abi6-compat abi7-compat )
 		tbb
@@ -84,6 +85,7 @@
 		media-libs/openexr:=
 	)
 	opensubdiv? ( >=media-libs/opensubdiv-3.4.0[cuda=,opencl=] )
+	optix? ( <dev-libs/optix-7.1.0 )
 	openvdb? (
 		~media-gfx/openvdb-7.0.0[abi6-compat(-)?,abi7-compat(-)?]
 		dev-libs/c-blosc:=
@@ -181,6 +183,7 @@
 		-DWITH_CYCLES_DEVICE_CUDA=$(usex cuda TRUE FALSE)
 		-DWITH_CYCLES=$(usex cycles)
 		-DWITH_CYCLES_DEVICE_OPENCL=$(usex opencl)
+		-DWITH_CYCLES_DEVICE_OPTIX=$(usex optix TRUE FALSE)
 		-DWITH_CYCLES_STANDALONE=$(usex standalone)
 		-DWITH_CYCLES_STANDALONE_GUI=$(usex standalone)
 		-DWITH_CYCLES_OSL=$(usex osl)
@@ -218,6 +221,7 @@
 		-DWITH_SYSTEM_LZO=ON
 		-DWITH_TBB=$(usex tbb)
 		-DWITH_X11=$(usex !headless)
+		-DOPTIX_INCLUDE_DIR=/opt/optix/include
 	)
 	cmake_src_configure
 }