See here. If this is a machine where ar3 has not been previously installed, pay particular attention to the "Additional Notes" at the bottom of the page. Let me know how it goes.
"Since there is no Ambient Occlusion Slot in 'Texture Set' Mode of the nXt-Material Editor,
I found another way around what to do with AO Maps:
Baking it into Diffuse; e.g. Multiplying AO Map over Diffuse/Albedo/Colour in…"
"The wooden texture of the TV-Console looks quite decent.
The Wallpaper on the left has an interesting structure, maybe it would look even better, if you make the texture seamless + applying a little bit of depth, e. g. with highpass - filter in PS?"
"Thank you for help on this topic!
Will test 'Automesher LT' (developed by Automapki), if I run into troubles again.
[Sometimes I was wondering about, if this forum is still alive... .]"
"Good day,
I searched the former forum posts and found another option to solve this problem which is another plugin to autocad-----AUTOMAPKI. You can give it a try."