It's pancake-flat 2D fonts only, by using Create Text Prop, unless the final Poser 12 has something in it. So far as I know they can't be extruded and bevelled in Poser.

I've no idea why your Lightwave fonts look bad in Poser. But there are free 3D wordmaker utilities still working, that were made by Poser and Bryce people. Have a look at Elefont, and then PoseRay is your converter to obj for Poser.

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Learn the Secrets of Poser 11 and Line-art Filters.