Quick test shader for this thread https://forum.unity.com/threads/smooth-filling-of-the-2d-pipe-with-texture.845848/#post-5584480 Shader source:https://github.com/UnityCommunity/UnityLibrary/blob/master/Assets/Shaders/2D/Patterns/ScrollingFill.shader Sample fbx file (used in screenshot)https://github.com/unitycoder/BlogUploads/blob/master/models/lineuv.FBX

Uploaded sources for the old mesh exploder project https://unitycoder.com/blog/2013/08/02/poor-mans-mesh-exploder/ download project: https://github.com/unitycoder/SimpleMeshExploder