The issue you're experiencing with texture streaming in Unreal Engine, where the texture appears crushed or shows unwanted borders, is likely related to texture filtering and mipmapping settings. When textures are scaled or transformed, Unreal Engine applies texture filtering to map image pixels to screen pixels, which can result in artifacts if not configured properly. To address this, ensure that your texture filtering is set to bilinear or trilinear, which can help smooth out the appearance. Additionally, enabling mipmapping can improve the quality by using the most appropriate texture size for the current screen size, reducing the likelihood of pixelation or aliasing. Adjusting these settings in Unreal Engine should help maintain the fidelity of your textures across different scales.