diff --git a/src/canvas.cpp b/src/canvas.cpp
index e13e095..097f7cf 100644
--- a/src/canvas.cpp
+++ b/src/canvas.cpp
@@ -1254,7 +1254,7 @@ void Canvas::export_equirectangular_thread(std::string file_path)
     glBindTexture(GL_TEXTURE_CUBE_MAP, cube_id);
     for (GLuint i = 0; i < 6; i++)
         glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + i, 0, GL_RGBA8, m_width, m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
-    int faces[]{
+    static int faces[]{
         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, // front
         GL_TEXTURE_CUBE_MAP_NEGATIVE_X, // right
         GL_TEXTURE_CUBE_MAP_POSITIVE_Z, // back
@@ -1268,6 +1268,10 @@ void Canvas::export_equirectangular_thread(std::string file_path)
 
     for (int i = 0; i < 6; i++)
     {
+        // prepare common states
+        glViewport(0, 0, m_width, m_height);
+        glEnable(GL_BLEND);
+
         ShaderManager::use(kShader::TextureAlpha);
         ShaderManager::u_int(kShaderUniform::Highlight, false);
         ShaderManager::u_int(kShaderUniform::Tex, 0);