//--------------------//
#region Reference control
/// <summary>
/// Calls <see cref="Asset.HoldReference"/> for all contained <see cref="XTexture"/>s.
/// </summary>
public void HoldReference()
{
if (DiffuseMaps != null)
{
foreach (var texture in DiffuseMaps.WhereNotNull())
{
texture.HoldReference();
}
}
NormalMap?.HoldReference();
HeightMap?.HoldReference();
SpecularMap?.HoldReference();
EmissiveMap?.HoldReference();
}