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And I was too lazy to write a C wrapper for P/Invoke. But these C++ header files point to a perfect solution - parse file and implement my own UnityFS parser/reader. Since it was compiled with Microsoft Visual C++ 2010, I was unable to use it directly(C++ ABI constantly changes with every MSVC release). Luckily this toolkit provides some API and documentation. I tried the command line support but failed (maybe I was too stupid). However, acquiring thousands of texture assets from 2000+ isolated files is not an easy job. It did a great job extracting resources I needed graphically. Then I turned to a tool called Unity Assets Bundle Extractor. Since resource extraction has not been implemented at this moment, Disunity couldn’t be my choice.
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Disunity has been refactored, and remaining work is still in progress (at least the moment I write this article). I thought I could extract assets I needed with existing tools (e.g. DISCLAIMER: I will not tell you details about encryption.
#Unity assets bundle extractor can not open file for writing how to
To find prefabs when you can't click on them ingame or in the menu, see how to find any vanilla or custom prefab in the ModTools article. Network elevations such as bridge and tunnel can be found inside the prefab in m_netAI. There you can find the m_segmentMesh and m_segmentMaterial which contains the textures. Network Segments & Nodesįor networks, the nodes and segments can be found inside the prefab in m_nodes and m_segments. If a building has sub-buildings or sub-meshes, those can be found inside the prefab in m_subBuildings and m_subMeshes. Alternatively, inside the prefab you can find the m_mesh and textures inside m_material and dump those. If you preview it, you can dump it there. You can click on the desired item in the menu as if you are about to plop it, and then find the prefab in Scene Explorer > Tool Controller > BuildingTool / PropTool / TreeTool / NetTool > m_prefab. For buildings and vehicles, you can simply click on it ingame and press dump asset there. This assumes you are familiar with ModTools usage.