diff --git a/engine/canvas.cpp b/engine/canvas.cpp
index 460ed94..9fcf02c 100644
--- a/engine/canvas.cpp
+++ b/engine/canvas.cpp
@@ -1270,11 +1270,11 @@ void ui::Canvas::export_cubes(std::string data_path)
 	const int stride = m_width * 4;
 	auto buffer = std::make_unique<uint8_t[]>(m_width * m_height * 4);
 	auto flipped = std::make_unique<uint8_t[]>(m_width * m_height * 4);
-	for (auto i : m_order)
+	for (int layer = 0; layer < m_order.size(); layer++)
 	{
 		for (int plane = 0; plane < 6; plane++)
 		{
-			auto& l = m_layers[i];
+			auto& l = m_layers[m_order[layer]];
 			l.m_rtt[plane].bindFramebuffer();
 			glReadPixels(0, 0, m_width, m_height, GL_RGBA, GL_UNSIGNED_BYTE, buffer.get());
 			l.m_rtt[plane].unbindFramebuffer();
@@ -1305,7 +1305,7 @@ void ui::Canvas::export_cubes(std::string data_path)
 			}
 
 			static char name[128];
-			sprintf(name, "%s-%02d-%d.png", data_path.c_str(), i, plane);
+			sprintf(name, "%s-%02d-%d.png", data_path.c_str(), layer, plane);
 			int ret = stbi_write_png(name, m_width, m_height, 4, buffer.get(), 0);