Using GPU acceleration Resize Pro is the fastest texture resize tool for Unity in the world. Has no limits on texture formats and works even with textures that aren’t Read/Write enabled.
In Editor textures can be converted directly from Project window or by using batch converter. Run-time API adds ResizePro() extension method to the Texture2D class. Have questions?
Note:
• Tool is already included in Texture Adjustments asset.
• Scripts are packed in dll.
• (Only in editor) Even ResizePro supports all texture formats, generated texture can be saved only in .jpg, .png and .tga formats.
• (Only in run-time) If memory allocated by source texture is locked, then ResizePro can not directly modify it and creates new resized texture.