this is a free tool that can be a good time saver for your modeling workflow

for installation go to 3dsmax menu > Scripting> Install Max Creation Graph (.mcg) Package > select MGH louver generator_v0.0.325.mcg file then MGH louver generator will be available in your modifier list

try to use the last version of program (native version: 2022)

some limitations:

• don't work on solid object
• don't work on non-flattened surfaces
• show bugs if your mesh has multiple mesh elements (detach and apply separately)
• use with minimum possible polygons

parameteres:

• louver number
• directions
• offset (between two louver)
• z offset
• cut start
• cut end
• louver width
• louver height
• louver rotation