# How to improve rendering

The rendering above the red line(zoomed in) was a result of: \documentclass[journal]{IEEEtran}

The rendering below the red line(zoomed in) was a result of: \documentclass[journal]{AIAA}

Why is there such a huge difference? Can I change something in the AIAA class file so that it yields results similar to the IEEEtran class file?

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I do not have AIAA.cls, but it clearly uses bitmap fonts. Not having the document class, I am not going to provide you with a definite answer, but perhaps take a look at this article: dsanta.users.ch/resources/type1.html – Harold Cavendish Oct 31 '11 at 9:24
We also have a few questions related to this issue (bitmap fonts) on this site. For example, tex.stackexchange.com/q/1291/86 seems relevant. You'll find more if you search for bitmap fonts. – Loop Space Oct 31 '11 at 9:26
Also note that there appears to be a newer version aiaa-tc.cls since 2004 which uses vector fonts by default (\documentclass{aiaa-tc}). Documentation: tug.org/texlive/Contents/live/texmf-dist/doc/latex/aiaa/… – Harold Cavendish Oct 31 '11 at 9:32
@HarroldCavendish: I believe this could be an answer. – Andrey Vihrov Oct 31 '11 at 9:49
@Andrey Vihrov: I shall wait for the OP's word before writing and answer because I am a little unsure whether the aiaa-tc class is what he is looking for – it creates a single column article, while the aiaa a two column one. Most recent journal articles downloaded from the AIAA website feature a two column layout and the new class is most probably intended only for technical conference papers. From what I have read, it appears that aiaa.cls was used only for simulating journal appearance. The only official template that the AIAA provides is called “AIAA Meeting Papers Template”. – Harold Cavendish Oct 31 '11 at 10:13

After downloading the LaTeX template containingaiaa.clsfrom the AIAA official website and installing a couple of obsolete packages, most importantly dropping, I have found that the output uses vector Type 1 fonts.
The solution is therefore, as suggested by Stefan Kottwitz, in Why are Bitmap-Fonts used automatically? to install the cm-super package.
However, the aiaa.cls seems to be obsolete, which is indicated even by its placement in a folder named pre2004. Therefore I recommend usingaiaa-tc.clswhen possible.
@ShashankSawant Might be a silly question, but did it or you run updmap-sys? – Harold Cavendish Oct 31 '11 at 15:39