Check your document raster effects settings. Increase them to the proper document dpi/ ppi. That should fix it. Also make sure to view your document at 100% to judge quality of those pixel effects.
Did you turn off the preference for antialiased artwork?
If you're talking about the hairline jaggies evident around the edges of the front faces that were filled with linear gradients before applying 3D Effect: That's because the grad fill gets rasterized when you do that. You can see this by invoking Expand Appearance and then dissecting the results. You'll find that the paths of the front faces are now clipping paths containing raster images.
Don't do that.
If you want grad fills on the faces of 3D Effect objects, start with solid fills, not grads, and no strokes. Then apply 3D Effect to create the extrusion. Then expand the results. Then direct-select the paths of the front faces and apply grad fills.
Thanks Jacob...will have a go! Trying anything I can right now!
Yeah I did have a look at the 'document raster effects settings' already as I thought it maybe that!...and also set to 100%.
I was actually following this tutorial, as I wanted to achieve the brushed metal effect:
After I did this tutorial that's when I saw things starting to not look right! Maybe I went wrong somewhere...I dunno!
Thanks Jet....hmmm not crossed any of these...so will have ago! Hope it works. Will let you know.
Thanks Wade...looks better than what I came out with. What did you do?
Mentioned above...but this was the actual tutorial I was kinda following!
Was looking to achieve a brushed metal effect then I came upon this problem!
I believe I gave the original text a fill of none and then added a new fill and applied the 3D effect to the new fill.