From 18a21a73ab0d7d497bc8a661a6b23a5459cd3904 Mon Sep 17 00:00:00 2001
From: duncanspumpkin <duncans_pumpkin@hotmail.co.uk>
Date: Tue, 7 Apr 2020 18:34:46 +0100
Subject: [PATCH] Fix balloons import/export issue

---
 src/openrct2/world/Balloon.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/openrct2/world/Balloon.cpp b/src/openrct2/world/Balloon.cpp
index 48501fcd40..13db21c0ae 100644
--- a/src/openrct2/world/Balloon.cpp
+++ b/src/openrct2/world/Balloon.cpp
@@ -47,6 +47,11 @@ void Balloon::Update()
         {
             time_to_move = 0;
             frame++;
+            // NOTE: To keep S6 Compatibility this field needs to roll over after 1 byte
+            if (frame == 256)
+            {
+                frame = 0;
+            }
             sprite_move(x, y, z + 1, this);
 
             int32_t maxZ = 1967 - ((x ^ y) & 31);