Customize>Units Setup to Metric meters or you will be working in feet & inches…
Our first corridor blocks will be made up of 4 separate flat planes, each 3m x 3m.
Remember to set project folder in Max, this is where you will also export your textures from Photoshop (to the scene assets/images folder.
Use scanline renderer (it is going to Unity anyway)
Show shaded material in viewport. Box > Editable Poly
In Photoshop set up a new document for your textures.
At this stage we will use a 512 x 512 Pixels square. Higher quality textures will be 1024 x 1024 px or 2048 x 2048 px.
Always set the pixel dimensions as a power of 2:
2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096
You may find setting the resolution to 600 pixels/inch (ppi) helps with the fx settings. (I prefer 72 ppi, the usual ‘Web’ standard).
You can generate textures from scratch by setting your foreground and background colours and then using Filter>Render>Clouds to create a parchment effect.
To make this look more like wood, try Filter>Render>Fibers and experiment with the settings.
to retouch the edges to create a texture that will tile.