posted 06-04-22 13:27 ET (US)   
The Caesar IV Models have a .gr2 file extension which means they were made using in Granny 3D.
There is a "Granny3D Viewer" available if you google it.
It is at
and might be an interesting tool for modders to check out and hopefully think up some new ideas of things to do.
To use the viewer
1. Create a "c:\Rome\MASTER\Data" folder on your Windows PC
2. Copy everything from your Caesar IV "Data"folder into the one created in step 1.
3. Unzip and run the viewer then open the *.gr2 files.
If you followed steps 1 then all the texture and colours will appears on the models. If you skipped step one then the models might not be colored correctly and turn out grey.