RenderTransforms and RenderTransformOrigin
RenderTransformOrigins are different in WPF and Avalonia: If you apply a RenderTransform, keep in mind that default value for the RenderTransformOrigin in Avalonia is RelativePoint.Center. In WPF the default value is RelativePoint.TopLeft (0, 0). In controls like Viewbox the same code will lead to a different rendering behavior:
In WPF:
In Avalonia:
In AvaloniaUI, to get the same scale transform we should indicate that the RenderTransformOrigin is the TopLeft part of the Visual.
Avalonia XPF - Cross-Platform WPF