clear new layers

engine/brush.h

@@ -81,6 +81,9 @@ public:
     bool create(int width, int height, std::string name)
     {
         m_rtt.create(width, height);
+        m_rtt.bindFramebuffer();
+        m_rtt.clear();
+        m_rtt.unbindFramebuffer();
         return true;
     }
 };