Prevent material double free then crash #597
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Prevent Double Free Crash
ViewNode2was freeing material by it's own, also didMaterialLoaderwhen exiting composition. Given that situation a crash was happening when using aScenethat usesViewNode2renderables.The fix
To fix that the
MaterialLoadertracks it's allocated materials, and theViewNode2destroy the material through theMaterialLoaderinstead of deleting the instance directly from theEngine