How to replace an Texture Asset in Unreal Editor with C++？

[Mirro1871]

void CreateTexture() {
	// Texture Information
	FString FileName = FString("MyTexture");
	int width = 1024;
	int height = 1024;
	uint8 * pixels = (uint8 *)malloc(height * width * 4); // x4 because it's RGBA. 4 integers, one for Red, one for Green, one for Blue, one for Alpha

	// filling the pixels with dummy data (4 boxes: red, green, blue and white)
	for (int y = 0; y < height; y++)
	{
		for (int x = 0; x < width; x++)
		{
			if (x < width / 2) {
				if (y < height / 2) {
					pixels[y * 4 * width + x * 4 + 0] = 255; // R
					pixels[y * 4 * width + x * 4 + 1] = 0;   // G
					pixels[y * 4 * width + x * 4 + 2] = 0;   // B
					pixels[y * 4 * width + x * 4 + 3] = 255; // A
				}
				else {
					pixels[y * 4 * width + x * 4 + 0] = 0;   // R
					pixels[y * 4 * width + x * 4 + 1] = 255; // G
					pixels[y * 4 * width + x * 4 + 2] = 0;   // B
					pixels[y * 4 * width + x * 4 + 3] = 255; // A
				}
			}
			else {
				if (y < height / 2) {
					pixels[y * 4 * width + x * 4 + 0] = 0;   // R
					pixels[y * 4 * width + x * 4 + 1] = 0;   // G
					pixels[y * 4 * width + x * 4 + 2] = 255; // B
					pixels[y * 4 * width + x * 4 + 3] = 255; // A
				}
				else {
					pixels[y * 4 * width + x * 4 + 0] = 255; // R
					pixels[y * 4 * width + x * 4 + 1] = 255; // G
					pixels[y * 4 * width + x * 4 + 2] = 255; // B
					pixels[y * 4 * width + x * 4 + 3] = 255; // A
				}
			}
		}
	}


	// Create Package
	FString pathPackage = FString("/Game/MyTextures/");
	FString absolutePathPackage = FPaths::GameContentDir() + "/MyTextures/";

	FPackageName::RegisterMountPoint(*pathPackage, *absolutePathPackage);

	UPackage * Package = CreatePackage(nullptr, *pathPackage);

	// Create the Texture
	FName TextureName = MakeUniqueObjectName(Package, UTexture2D::StaticClass(), FName(*FileName));
	UTexture2D* Texture = NewObject<UTexture2D>(Package, TextureName, RF_Public | RF_Standalone);

	// Texture Settings
	Texture->PlatformData = new FTexturePlatformData();
	Texture->PlatformData->SizeX = width;
	Texture->PlatformData->SizeY = height;
	Texture->PlatformData->PixelFormat = PF_R8G8B8A8;

	// Passing the pixels information to the texture
	FTexture2DMipMap* Mip = new(Texture->PlatformData->Mips) FTexture2DMipMap();
	Mip->SizeX = width;
	Mip->SizeY = height;
	Mip->BulkData.Lock(LOCK_READ_WRITE);
	uint8* TextureData = (uint8 *) Mip->BulkData.Realloc(height * width * sizeof(uint8)*4);
	FMemory::Memcpy(TextureData, pixels, sizeof(uint8) * height * width * 4);
	Mip->BulkData.Unlock();

	// Updating Texture & mark it as unsaved
	Texture->AddToRoot();
	Texture->UpdateResource();
	Package->MarkPackageDirty();

	UE_LOG(LogTemp, Log, TEXT( "Texture created: %s" ), &FileName);

	free(pixels);
	pixels = NULL;
}