diff --git a/data/File.h b/data/File.h
new file mode 100644
index 0000000..0f6d48f
--- /dev/null
+++ b/data/File.h
@@ -0,0 +1,115 @@
+#ifndef FS_FILE_H
+#define FS_FILE_H
+
+#include <string>
+#include <vector>
+
+
+
+
+#if __cplusplus > 201103L
+
+	// use new cross-platform std::experimental stuff
+	#include <experimental/filesystem>
+
+namespace FS {
+
+	class File {
+
+		std::experimental::filesystem::path path;
+
+	public:
+
+		File(const std::string& fileOrFolder) : path(fileOrFolder) {
+
+		}
+
+		bool exists() const {
+			return std::experimental::filesystem::exists(path);
+		}
+
+		std::vector<File> listFiles() const {
+			std::vector<File> res;
+			for (std::experimental::filesystem::directory_entry entry : std::experimental::filesystem::directory_iterator(path)) {
+				const std::string abs = entry.path().string();
+				res.push_back(File(abs));
+			}
+			return res;
+		}
+
+		std::string getPath() const {
+			return path.string();
+		}
+
+		std::string getFilename() const {
+			return path.filename().string();
+		}
+
+	};
+
+}
+
+#else
+
+	// use linux-only fallback
+
+	#include <dirent.h>
+	#include <sys/stat.h>
+
+namespace FS {
+
+	class File {
+
+		std::string path;
+
+	public:
+
+		File(const std::string& fileOrFolder) : path(fileOrFolder) {
+
+		}
+
+		bool exists() const {
+			struct stat st;
+			int res = stat(path.c_str(), &st );
+			return res == 0;
+		}
+
+		/** list of all files/folders within the current folder */
+		std::vector<File> listFiles() const {
+
+			std::vector<File> res;
+
+			DIR* dir;
+
+			dir = opendir(path.c_str());
+			if (!dir) {throw Exception("failed to open folder " + path);}
+
+			// fetch all entries
+			while(true) {
+				dirent* entry = readdir(dir);
+				if (!entry) {break;}
+				const std::string abs = path + "/" + entry->d_name;
+				res.push_back(File(abs));
+			}
+
+			return res;
+
+		}
+
+		const std::string& getPath() const {
+			return path;
+		}
+
+		const std::string getFilename() const {
+			const size_t lastSlash = path.find_last_of("/");
+			if (std::string::npos == lastSlash) {return path;}
+			std::string name = path.substr(lastSlash+1);
+			return name;
+		}
+
+	};
+
+}
+#endif
+
+#endif // FS_FILE_H
diff --git a/wifi/estimate/ray3/OBJPool.h b/wifi/estimate/ray3/OBJPool.h
index a10c2d7..037dd5b 100644
--- a/wifi/estimate/ray3/OBJPool.h
+++ b/wifi/estimate/ray3/OBJPool.h
@@ -11,7 +11,8 @@
 // LINUX ONLY
 //#include <dirent.h>
 //#include <stdio.h>
-#include <experimental/filesystem>
+#include "../../../data/File.h"
+
 
 #include "../../../misc/Debug.h"
 
@@ -83,17 +84,17 @@ namespace Ray3D {
 		/** scan the given folder for all *.obj files */
 		void scanFolder(const std::string& folder) {
 
-			std::experimental::filesystem::path d(folder);
-			if (!std::experimental::filesystem::exists(d)) {
+			FS::File d(folder);
+			if (!d.exists()) {
 				throw Exception("OBJPool: folder not found: " + folder);
 			}
 
-			for (std::experimental::filesystem::directory_entry entry : std::experimental::filesystem::directory_iterator(d)) {
-				const std::string absFile = entry.path().string();
-				if (endsWith(absFile, ".obj")) {
-					std::string name = entry.path().filename().string();
+			for (const FS::File& f : d.listFiles()) {
+				std::string name = f.getFilename();
+				if (endsWith(name, ".obj")) {
+					//std::string name = entry.path().filename().string();
 					name = name.substr(0, name.length() - 4);	// without extension
-					load(absFile, name);
+					load(f.getPath(), name);
 				}
 			}