diff --git a/src/modules/voxelformat/GLTFFormat.cpp b/src/modules/voxelformat/GLTFFormat.cpp
index ba9820f14..e9f4d7333 100644
--- a/src/modules/voxelformat/GLTFFormat.cpp
+++ b/src/modules/voxelformat/GLTFFormat.cpp
@@ -640,7 +640,7 @@ bool GLTFFormat::loadGlftAttributes(const core::String &filename, core::StringMa
 bool GLTFFormat::subdivideShape(const tinygltf::Model &model, const core::DynamicArray<uint32_t> &indices,
 								const core::DynamicArray<GltfVertex> &vertices,
 								const core::StringMap<image::ImagePtr> &textures,
-								core::DynamicArray<Tri> &subdivided) const {
+								TriCollection &subdivided) const {
 	const glm::vec3 &scale = getScale();
 	if (indices.size() % 3 != 0) {
 		Log::error("Unexpected amount of indices %i", (int)indices.size());
@@ -761,6 +761,7 @@ bool GLTFFormat::loadGltfNode_r(const core::String &filename, SceneGraph &sceneG
 		Log::warn(
 			"Large meshes will take a lot of time and use a lot of memory. Consider scaling the mesh!");
 	}
+	Log::debug("region mins(%i:%i:%i)/maxs(%i:%i:%i)", imins.x, imins.y, imins.z, imaxs.x, imaxs.y, imaxs.z);
 
 	SceneGraphNode node;
 	const SceneGraphTransform &transform = loadGltfTransform(gltfNode);
@@ -770,7 +771,7 @@ bool GLTFFormat::loadGltfNode_r(const core::String &filename, SceneGraph &sceneG
 
 	voxel::RawVolume *volume = new voxel::RawVolume(region);
 	node.setVolume(volume, true);
-	core::DynamicArray<Tri> subdivided;
+	TriCollection subdivided;
 	int newParent = parentNodeId;
 	if (!subdivideShape(model, indices, vertices, textures, subdivided)) {
 		Log::error("Failed to subdivide node %i", gltfNodeIdx);
diff --git a/src/modules/voxelformat/GLTFFormat.h b/src/modules/voxelformat/GLTFFormat.h
index 9c03d01c9..3fd8396a9 100644
--- a/src/modules/voxelformat/GLTFFormat.h
+++ b/src/modules/voxelformat/GLTFFormat.h
@@ -57,7 +57,7 @@ private:
 
 	bool subdivideShape(const tinygltf::Model &model, const core::DynamicArray<uint32_t> &indices,
 						const core::DynamicArray<GltfVertex> &vertices, const core::StringMap<image::ImagePtr> &textures,
-						core::DynamicArray<Tri> &subdivided) const;
+						TriCollection &subdivided) const;
 	void calculateAABB(const core::DynamicArray<GltfVertex> &vertices, glm::vec3 &mins, glm::vec3 &maxs) const;
 
 public:
diff --git a/src/modules/voxelformat/MeshFormat.cpp b/src/modules/voxelformat/MeshFormat.cpp
index a31855d32..831dd8ce5 100644
--- a/src/modules/voxelformat/MeshFormat.cpp
+++ b/src/modules/voxelformat/MeshFormat.cpp
@@ -40,11 +40,11 @@ bool MeshFormat::flipWinding(const glm::vec3 &scale) {
 	return (scale.x * scale.y * scale.z) < 0.0f ? true : false;
 }
 
-void MeshFormat::subdivideTri(const Tri &tri, core::DynamicArray<Tri> &tinyTris) {
+void MeshFormat::subdivideTri(const Tri &tri, TriCollection &tinyTris) {
 	const glm::vec3 &mins = tri.mins();
 	const glm::vec3 &maxs = tri.maxs();
 	const glm::vec3 size = maxs - mins;
-	if (glm::any(glm::greaterThan(size, glm::vec3(1.0f)))) {
+	if (size.x * size.y * size.z > 1.0f) {
 		Tri out[4];
 		tri.subdivide(out);
 		for (int i = 0; i < lengthof(out); ++i) {
@@ -55,10 +55,7 @@ void MeshFormat::subdivideTri(const Tri &tri, core::DynamicArray<Tri> &tinyTris)
 	tinyTris.push_back(tri);
 }
 
-void MeshFormat::voxelizeTris(voxel::RawVolume *volume, const core::DynamicArray<Tri> &subdivided) {
-	const voxel::Palette &pal = voxel::getPalette();
-	core::DynamicArray<glm::vec4> materialColors;
-	pal.toVec4f(materialColors);
+void MeshFormat::voxelizeTris(voxel::RawVolume *volume, const TriCollection &subdivided) {
 	struct PosSamplingEntry {
 		inline PosSamplingEntry(float _area, const glm::vec4 &_color) : area(_area), color(_color) {
 		}
@@ -107,6 +104,7 @@ void MeshFormat::voxelizeTris(voxel::RawVolume *volume, const core::DynamicArray
 			}
 		}
 	}
+	Log::debug("create voxels");
 	PaletteLookup palLookup;
 	for (const auto &entry : posMap) {
 		const PosSampling &pos = entry->second;
@@ -115,6 +113,7 @@ void MeshFormat::voxelizeTris(voxel::RawVolume *volume, const core::DynamicArray
 		const voxel::Voxel voxel = voxel::createVoxel(voxel::VoxelType::Generic, index);
 		volume->setVoxel(entry->first, voxel);
 	}
+	Log::debug("fill hollows");
 	voxelutil::fillHollow(*volume, voxel::Voxel(voxel::VoxelType::Generic, 2));
 }
 
diff --git a/src/modules/voxelformat/MeshFormat.h b/src/modules/voxelformat/MeshFormat.h
index 47fc4ca60..1217ab792 100644
--- a/src/modules/voxelformat/MeshFormat.h
+++ b/src/modules/voxelformat/MeshFormat.h
@@ -87,12 +87,14 @@ protected:
 		}
 	};
 
+	using TriCollection = core::DynamicArray<Tri, 512>;
+
 	/**
 	 * Subdivide until we brought the triangles down to the size of 1 or smaller
 	 */
-	static void subdivideTri(const Tri &tri, core::DynamicArray<Tri> &tinyTris);
+	static void subdivideTri(const Tri &tri, TriCollection &tinyTris);
 
-	static void voxelizeTris(voxel::RawVolume *volume, const core::DynamicArray<Tri> &tinyTris);
+	static void voxelizeTris(voxel::RawVolume *volume, const TriCollection &tinyTris);
 
 	struct MeshExt {
 		MeshExt(voxel::Mesh *mesh, const SceneGraphNode &node, bool applyTransform);
diff --git a/src/modules/voxelformat/OBJFormat.cpp b/src/modules/voxelformat/OBJFormat.cpp
index c9d7ff241..5c17d82a9 100644
--- a/src/modules/voxelformat/OBJFormat.cpp
+++ b/src/modules/voxelformat/OBJFormat.cpp
@@ -189,7 +189,7 @@ bool OBJFormat::saveMeshes(const core::Map<int, int> &, const SceneGraph &sceneG
 
 void OBJFormat::subdivideShape(const tinyobj::mesh_t &mesh, const core::StringMap<image::ImagePtr> &textures,
 							  const tinyobj::attrib_t &attrib, const std::vector<tinyobj::material_t> &materials,
-							  core::DynamicArray<Tri> &subdivided) {
+							  TriCollection &subdivided) {
 	const glm::vec3 &scale = getScale();
 	int indexOffset = 0;
 	for (size_t faceNum = 0; faceNum < mesh.num_face_vertices.size(); ++faceNum) {
@@ -342,7 +342,7 @@ bool OBJFormat::loadGroups(const core::String &filename, io::SeekableReadStream
 			SceneGraphNode node;
 			node.setVolume(volume, true);
 			node.setName(shape.name.c_str());
-			core::DynamicArray<Tri> subdivided;
+			TriCollection subdivided;
 			subdivideShape(shape.mesh, textures, attrib, materials, subdivided);
 			voxelizeTris(volume, subdivided);
 			return core::move(node);
diff --git a/src/modules/voxelformat/OBJFormat.h b/src/modules/voxelformat/OBJFormat.h
index ba3d8dfdc..a41fa66f2 100644
--- a/src/modules/voxelformat/OBJFormat.h
+++ b/src/modules/voxelformat/OBJFormat.h
@@ -23,7 +23,7 @@ private:
 							  glm::vec3 &maxs);
 	static void subdivideShape(const tinyobj::mesh_t &mesh, const core::StringMap<image::ImagePtr> &textures,
 							  const tinyobj::attrib_t &attrib, const std::vector<tinyobj::material_t> &materials,
-							  core::DynamicArray<Tri> &subdivided);
+							  TriCollection &subdivided);
 
 public:
 	bool saveMeshes(const core::Map<int, int> &, const SceneGraph &, const Meshes& meshes, const core::String &filename, io::SeekableWriteStream& stream, const glm::vec3 &scale, bool quad, bool withColor, bool withTexCoords) override;
diff --git a/src/modules/voxelformat/STLFormat.cpp b/src/modules/voxelformat/STLFormat.cpp
index 9980b6431..436ea6fb5 100644
--- a/src/modules/voxelformat/STLFormat.cpp
+++ b/src/modules/voxelformat/STLFormat.cpp
@@ -16,7 +16,7 @@ namespace priv {
 static constexpr const size_t BinaryHeaderSize = 80;
 }
 
-void STLFormat::subdivideShape(const core::DynamicArray<Face> &faces, core::DynamicArray<Tri> &subdivided) {
+void STLFormat::subdivideShape(const core::DynamicArray<Face> &faces, TriCollection &subdivided) {
 	const glm::vec3 &scale = getScale();
 
 	for (const Face &face : faces) {
@@ -175,7 +175,7 @@ bool STLFormat::loadGroups(const core::String &filename, io::SeekableReadStream
 	SceneGraphNode node;
 	node.setVolume(volume, true);
 	node.setName(filename);
-	core::DynamicArray<Tri> subdivided;
+	TriCollection subdivided;
 	subdivideShape(faces, subdivided);
 	voxelizeTris(volume, subdivided);
 	sceneGraph.emplace(core::move(node));
diff --git a/src/modules/voxelformat/STLFormat.h b/src/modules/voxelformat/STLFormat.h
index 39dc4b195..ae448082f 100644
--- a/src/modules/voxelformat/STLFormat.h
+++ b/src/modules/voxelformat/STLFormat.h
@@ -35,7 +35,7 @@ private:
 	};
 
 	static void calculateAABB(const core::DynamicArray<Face> &faces, glm::vec3 &mins, glm::vec3 &maxs);
-	static void subdivideShape(const core::DynamicArray<Face> &faces, core::DynamicArray<Tri> &subdivided);
+	static void subdivideShape(const core::DynamicArray<Face> &faces, TriCollection &subdivided);
 
 	bool writeVertex(io::SeekableWriteStream &stream, const MeshExt &meshExt, const voxel::VoxelVertex &v1, const glm::vec3 &offset, const glm::vec3 &scale);