Hi CRC01001,

In Punch, each texture is composed by 3 files: PPV (the thumbnail), PTX (the texture) and PTI, (the information).
The size of the texture appearing in the 3D is not related with the scale of you plan, but with the size of the texture in the program. To change this info you can use two ways

For Punch AS 4000
Open the desired material with the material workshop--> Material info--> "Width=xx Height=xx"
Change these values until they fit your necessities --> Save--> In liveview, check if the size of the material is OK, or repeat as necessary

For Punch Platinum 8
Same as above, using the material modifier--> save to material library

For other Punch programs
1 - Go to the Windows Explorer-->Program Files-->(your Punch Program)-->Textures-->find the texture you wish to change
2 - In each tile, you will find 3 files (2 bitmaps and 1 PTI). The PTI is the description
3 - Right click in the file TileXY1 PTI File-->Open with-->Notepad
4 - You will see
[Size]
Width=xx
Height=xx
Change these values until they fit your necessities
5 -Save it in the Notepad.
6 - In liveview, check if the size if the size is OK, or repeat as necessary

Let us know if you need more help

Patricia