Texture Memory Overload

Development Rendering
1

I am dynamically loading textures at runtime and it is working perfectly. Only issue is when I m loading 1920x1080 resolution image, it increase Texture Memory by 18 to 20mb per image even if image size is couple of mb. Is there a way that I can compress the Texture after it is loaded in as I am loading around 60 to 100 images at runtime, texture memory goes over its budget and because of it some of the in game streaming texture are not able to load properly.

Here is the code that I m using to load textures at runtime


UTexture2D* Texture = nullptr;
     IsValid = false;
 
     TArray<uint8> CompressedData;
     if (!FFileHelper::LoadFileToArray(CompressedData, *InImagePath))
     {
         return nullptr;
     }
     
     IImageWrapperPtr ImageWrapper = GetImageWrapperByExtention(InImagePath);
 
     if (ImageWrapper.IsValid() && ImageWrapper->SetCompressed(CompressedData.GetData(), CompressedData.Num()))
     { 
         const TArray<uint8>* UncompressedBGRA = nullptr;
         if (ImageWrapper->GetRaw(ERGBFormat::BGRA, 8, UncompressedBGRA))
         {
             Texture = UTexture2D::CreateTransient(ImageWrapper->GetWidth(), ImageWrapper->GetHeight(), PF_B8G8R8A8);
             if (Texture != nullptr)
             {
                 IsValid = true;
                 
                 OutWidth = ImageWrapper->GetWidth();
                 OutHeight = ImageWrapper->GetHeight();
 
                 void* TextureData = Texture->PlatformData->Mips[0].BulkData.Lock(LOCK_READ_WRITE);
                 FMemory::Memcpy(TextureData, UncompressedBGRA->GetData(), UncompressedBGRA->Num());
                 Texture->PlatformData->Mips[0].BulkData.Unlock();
                 Texture->UpdateResource();
             }
         }
     }
 
     return Texture;

Thanks,

2

Textures must be a power of two, i.e. 16x16, 512x512, 2048x2048. My understanding is that if it isn’t you have a greater impact on memory, which may be the cause of your overload.

3

Even if I do power of 2, Memory Footprint for loading each texture at runtime is too high.
And if I Preload those texture, it is using same memory as image size. So is there a way inside code where I can compress it after its being loaded?

Thanks,