Hi, I have a 3D render scene for lighting studys. each time I press render I get a folder with 24 .jpg's named: Render_frame_000, 001, 002etc with I would like to rename Light_study_0am, 1am, 2am etc. The rendered frames willl always come out with the same names, so i would like to be able to drop a .bat file in the said folder to rename them. This is what iv started out with: @echo off title Renamer dir rename Render_frame_001.jpg %Light_study_6am%.jpg rename Render_frame_002.jpg %Light_study_7am%.jpg rename Render_frame_003.jpg %Light_study_8am%.jpg rename Render_frame_004.jpg %Light_study_9am%.jpg pause but I get "the system cannot find file specified" I know this is a very noob question but when it comes to coding I am.. Any help would be greatly appreciated. thanks Simon

Hi, quick update. Replacing "rename Render_frame_001.jpg %Light_study_6am%.jpg" with "REN Render_frame_001.jpg Light_study_1am.jpg" seems to do the trick. thanks for looking.

The % signs are used for variable substitution. I don't think you need them in your case. As you have found out yourself, it works when you remove them.