You need to tweak the quality settings under Tools / Drawing Options before saving your jpg or tiff.
I dont feel any rendering software may provide you 3D image, You need to do some stuff after to make it appear as 3D. Can you upload the model of which 3D image you are interested in.
And you might actually interested in 2D isometric image only.
You can bring little realistic effect with the help of perspective view and its rendering, may give you a 3D effect.
You can see the image I attached here. I hope it appears more like 3D in normal viewing.
Else for 3D images, you either need Monitor or as you are going to prepare presentation, so project which supports 3D viewing. (It will include Shutter Glasses or Anaglyph Glasses use.)
01-0074.bmp 5.9 MB