How to make UProceduralMeshComponent with bDoubleSidedGeometry=true?

SiggiG · July 23, 2021, 6:59am

You can create flipped polygons, or if you just need it to render from both sides you can set a flag in your material.

I also have a (pretty old by now) examples for how to build geometry in code, which includes double sided geometry. This uses an alternative to ProceduralMeshComponent called the RuntimeMeshComponent:

github.com

SiggiG/ProceduralMeshDemos/blob/master/Plugins/ProceduralMeshes/Source/ProceduralMeshes/Private/SimpleCylinderActor.cpp

// Copyright Sigurdur Gunnarsson. All Rights Reserved. 
// Licensed under the MIT License. See LICENSE file in the project root for full license information. 
// Example cylinder mesh

#include "SimpleCylinderActor.h"
#include "Providers/RuntimeMeshProviderStatic.h"

ASimpleCylinderActor::ASimpleCylinderActor()
{
	PrimaryActorTick.bCanEverTick = false;
	StaticProvider = CreateDefaultSubobject<URuntimeMeshProviderStatic>(TEXT("RuntimeMeshProvider-Static"));
	StaticProvider->SetShouldSerializeMeshData(false);
}

void ASimpleCylinderActor::OnConstruction(const FTransform& Transform)
{
	Super::OnConstruction(Transform);
	GenerateMesh();
}

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