Be aware 1st barrel easy to piller. Recommend to pick and replace 1st Bareel after placing 2nd Barrel with snapping.
You can stack higher as much as you want.
ini. I use for creative.
grass.enable 0|r.shadowquality 0|r.VolumetricCloud 0|r.VolumetricFog 0|r.water.singlelayer.reflection 0|wp.Runtime.HLOD 0|r.shading.furnacetest.SampleCount 0|r.shading.furnacetest 1|r.PostProcessing.DisableMaterials 1|r.water.SingleLayer 0|ark.MaxActiveDestroyedMeshGeoCollectionCount 0|DebugStructures