Fixed aspect ratio for dual-viewport setups

Assets/Scripts/Fsr2ImageEffect.cs

@@ -299,7 +299,7 @@ namespace FidelityFX
             if (_helper == null || !_helper.enabled)
             {
                 // Render to a smaller portion of the screen by manipulating the camera's viewport rect
-                _renderCamera.aspect = (_displaySize.x * _originalRect.width) / (_displaySize.y * _originalRect.height);
+                _renderCamera.aspect = (float)_displaySize.x / _displaySize.y;
                 _renderCamera.rect = new Rect(0, 0, _originalRect.width * _maxRenderSize.x / _renderCamera.pixelWidth, _originalRect.height * _maxRenderSize.y / _renderCamera.pixelHeight);
             }