not too shabby! could use those touch ups, but definitely a unique piece. it is very original and pretty well organized for your first upload. i don't know that it will blend seamlessly with the standard RTP, but i bet it looks good in-game nonetheless. i'm giving you +1 because i'm sure you spent plenty of time generating this, and i feel it's worth it! great job!
i would take a closer look at the rainbow affect around the pipes and the grey wrapping your smoke. other than that, the aliasing probably won't pose much of a problem.
p.s. unfortunately, i no longer run RMXP on my CPU so i can't get a better look, but great job!