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I took this example from the documentation for SetPixel, i commented out Texture::Create and replaced it with Texture::Load but it crashes when doing memcpys but it doesn't if i don't load a texture and use Create instead. The texture loads fine, i'm able to display it. Error: HEAP[Test.debug.exe]: Heap block at 0655D900 modified at 0656192C past requested size of 4024 Test.debug.exe has triggered a breakpoint. In App::Start //texture = Texture::Create(256, 256); texture = Texture::Load("mytexture.tex"); // texture is defined in App.h //Create a buffer to store pixel data in int datasize = texture->GetMipmapSize(0); char* pixels = (char*)malloc(datasize); //Get the pixel data from the texture and invert it texture->GetPixels(pixels); char r, g, b, a; for (int x = 0; x<texture->GetWidth(); x++) { for (int y = 0; y<texture->GetHeight(); y++) { int p = (x*texture->GetWidth() + y) * 4; memcpy(&r, pixels + p + 0, 1); memcpy(&g, pixels + p + 1, 1); memcpy(&b, pixels + p + 2, 1); r = 255 - r; g = 255 - g; b = 255 - b; memcpy(pixels + p + 0, &r, 1); memcpy(pixels + p + 1, &g, 1); memcpy(pixels + p + 2, &b, 1); } } //Set the modified pixel data texture->SetPixels(pixels); free(pixels); [c++] SetPixel/memcpy crash