diff --git a/src/modules/image/CMakeLists.txt b/src/modules/image/CMakeLists.txt
index 20f8df27c..9781fbc55 100644
--- a/src/modules/image/CMakeLists.txt
+++ b/src/modules/image/CMakeLists.txt
@@ -2,7 +2,7 @@ set(SRCS
 	Image.cpp Image.h
 )
 set(LIB image)
-engine_add_module(TARGET ${LIB} SRCS ${SRCS} DEPENDENCIES io)
+engine_add_module(TARGET ${LIB} SRCS ${SRCS} DEPENDENCIES io util)
 if (USE_CLANG)
 	target_compile_options(${LIB} PRIVATE -Wno-unused-function)
 endif()
diff --git a/src/modules/image/Image.cpp b/src/modules/image/Image.cpp
index 4dab689ab..b168ced99 100644
--- a/src/modules/image/Image.cpp
+++ b/src/modules/image/Image.cpp
@@ -8,10 +8,12 @@
 #include "core/StringUtil.h"
 #include "core/concurrent/ThreadPool.h"
 #include "core/Assert.h"
+#include "io/BufferedReadWriteStream.h"
 #include "io/Filesystem.h"
 #include "core/StandardLib.h"
 #include "io/FormatDescription.h"
 #include "io/Stream.h"
+#include "util/Base64.h"
 
 #define STBI_ASSERT core_assert
 #define STBI_MALLOC core_malloc
@@ -182,4 +184,13 @@ bool Image::writePng() const {
 	return stbi_write_png(_name.c_str(), _width, _height, _depth, (const void*)_data, _width * _depth) != 0;
 }
 
+core::String Image::pngBase64() const {
+	io::BufferedReadWriteStream s;
+	if (!writePng(s, _data, _width, _height, _depth)) {
+		return "";
+	}
+	s.seek(0);
+	return util::Base64::encode(s);
+}
+
 }
diff --git a/src/modules/image/Image.h b/src/modules/image/Image.h
index 1bd02dc48..bdc7d6569 100644
--- a/src/modules/image/Image.h
+++ b/src/modules/image/Image.h
@@ -37,6 +37,7 @@ public:
 	static bool writePng(io::SeekableWriteStream &stream, const uint8_t* buffer, int width, int height, int depth);
 	static bool writePng(const char *name, const uint8_t *buffer, int width, int height, int depth);
 	bool writePng() const;
+	core::String pngBase64() const;
 
 	const uint8_t* at(int x, int y) const;
 
diff --git a/src/modules/voxelformat/GLTFFormat.cpp b/src/modules/voxelformat/GLTFFormat.cpp
index 4c531787e..593704c22 100644
--- a/src/modules/voxelformat/GLTFFormat.cpp
+++ b/src/modules/voxelformat/GLTFFormat.cpp
@@ -12,10 +12,12 @@
 #include "core/StringUtil.h"
 #include "core/concurrent/Lock.h"
 #include "engine-config.h"
+#include "image/Image.h"
 #include "io/StdStreamBuf.h"
 #include "io/Filesystem.h"
 #include "voxel/MaterialColor.h"
 #include "voxel/Mesh.h"
+#include "voxel/Palette.h"
 #include "voxel/VoxelVertex.h"
 #include "core/collection/DynamicArray.h"
 #include "voxelformat/SceneGraph.h"
@@ -111,20 +113,18 @@ bool GLTFFormat::saveMeshes(const core::Map<int, int> &meshIdxNodeMap, const Sce
 				Log::debug("Re-use material id %i for hash %" PRIu64, materialId, palette.hash());
 			} else {
 				const core::String hashId = core::String::format("%" PRIu64, palette.hash());
-				core::String palettename = core::string::stripExtension(filename);
-				palettename.append(hashId);
-				palettename.append(".png");
 
 				const int imageIndex = (int)m.images.size();
 				{
 					tinygltf::Image colorPaletteImg;
-					colorPaletteImg.uri = core::string::extractFilenameWithExtension(palettename).c_str();
+					image::Image image("pal");
+					image.loadRGBA((const unsigned char *)palette.colors, sizeof(palette.colors), voxel::PaletteMaxColors, 1);
+					const core::String &pal64 = image.pngBase64();
+					colorPaletteImg.uri = "data:image/png;base64,";
+					colorPaletteImg.uri += pal64.c_str();
 					m.images.emplace_back(core::move(colorPaletteImg));
 				}
 
-				if (!palette.save(palettename.c_str())) {
-					Log::error("Failed to save palette data");
-				}
 				const int textureIndex = (int)m.textures.size();
 				{
 					tinygltf::Texture paletteTexture;