From 18035a860497fd769806a72db24a55089da33c66 Mon Sep 17 00:00:00 2001
From: Wojtek Figat <wojtek@figat.pl>
Date: Sat, 19 Jul 2025 11:14:54 +0200
Subject: [PATCH] Fix incorrect image buffer usage in Render Output Control

---
 Source/Engine/UI/GUI/RenderOutputControl.cs | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Source/Engine/UI/GUI/RenderOutputControl.cs b/Source/Engine/UI/GUI/RenderOutputControl.cs
index b6717ffe6..9025cbc04 100644
--- a/Source/Engine/UI/GUI/RenderOutputControl.cs
+++ b/Source/Engine/UI/GUI/RenderOutputControl.cs
@@ -192,16 +192,19 @@ namespace FlaxEngine.GUI
             }
 
             // Draw backbuffer texture
-            var buffer = _backBufferOld ? _backBufferOld : _backBuffer;
+            var buffer = _backBuffer ? _backBuffer : _backBufferOld;
             var color = TintColor.RGBMultiplied(Brightness);
-            if (KeepAspectRatio)
+            if (KeepAspectRatio && buffer)
             {
                 float ratioX = bounds.Width / buffer.Width;
                 float ratioY = bounds.Height / buffer.Height;
                 float ratio = ratioX < ratioY ? ratioX : ratioY;
                 bounds = new Rectangle((bounds.Width - buffer.Width * ratio) / 2, (bounds.Height - buffer.Height * ratio) / 2, buffer.Width * ratio, buffer.Height * ratio);
             }
-            Render2D.DrawTexture(buffer, bounds, color);
+            if (buffer)
+                Render2D.DrawTexture(buffer, bounds, color);
+            else
+                Render2D.FillRectangle(bounds, Color.Black);
 
             // Push clipping mask
             if (ClipChildren)