3 Panel Steel Frame Window

ND-X Dirty (X = Adjustable)
Mirrored response on the Y

It's best rendered in Cycles

There are Controllers to Adjust:
- Overall Size
- Midsections
- Handle Height
- Opening for each Window (works separate)

In the Materials:
- Inside & Outside colors can be changed separate
- Dirt contrast is adjustable
- Putty can have color changed to look as if it was painted, yet still damaged

The textures tile and do not stretch,
even if the model stretches.

Texture Repetition is avoided by using Spiral mapping

This is for fast visual creation,
I kindly advise you to look up true dimensions if you are doing true to life visualizations.