I have a texture mapped surface that was imported into acrobat pro extended from VRML2. It is an area of hills with air photos mapped onto them. On some computers it displays very well and gives good resolution and a 3D look to the trees. On others the same surface in the same file looks smoothed over and blurred with no 3D effect and poor resolution. The hills are still there, just the mapped surface is flattened.

One of the 'good' computers is running XP on an Intel Mac. The 'bad' I've seen so far have been an old PC with XP and ~500 M RAM and a new PC with XP and 2 G of RAM.

So the question is: How do I get it to always display well?

The display is often going to rely on the state of the GPU. There are minimum requirements for the GPU. If these requirements aren't met, Acrobat 3D resorts to Software Rendering. You have no control over this, unless you have control over every machine your PDFs will be viewed on. Short of installing a better GPU, one thing that will help is to make sure all the GPU drivers on the machines these PDFs are being viewed on are up to date.

Thanks Steve.
What I didn't say was that another 'bad' was the same intel Mac that I run Windows on, but viewing the file in Mac mode. ie good detail Windows OS on Mac and bad detail Mac OS on same Mac.

You did provide me with the clue though. I set preferences to software rendering on the other PC and voila! Now to try the Mac...

Al.