Re: [nbos] [AS] Star density/frequency
~~Richard K~~
Mon May 28th, 2007
Hi Andrew, I'm working an a little tutorial about this.
I should have it posted possibly tonight (on NOX) or Tomorrow night at the
The problem most people find about AS is akin to what a 3D artist goes
through with setting up a scene (and avoiding huge polygon counts all at
once, lol), When working on huge Space opera-esque campaigns everything must
be made seperately and imported into the bigger picture, which is one of the
things Astro 2 is very good at.
You'll get what I mean when you see it (It will have lots-O'pics) . I'll
post a notice once I've uploaded it.
~~Richard K~~

----- Original Message -----
From: "Andrew Seel" <>
To: <>
Sent: Monday, May 28, 2007 9:21 AM
Subject: [nbos] [AS] Star density/frequency

> Hello everyone! I'm Andreus, new on the mailing list. I'm an avid user
> of AstroSynthesis 2.0 and have used it for months now. I just had a
> little gripe with the system I wanted to talk about, and possibly
> discuss a solution for.
> Currently, when generating new sector data, the only way to control
> the density of your starfields is "Star Frequency", which, in my
> experience, tends to be highly arbitrary. I like using clustered star
> distribution, as this tends to create interesting sectors with a lot
> of variance in cluster shape, which makes for fun storytelling.
> The "Star Frequency" slider seems to be broken, or at best, fairly
> random. Take for example the 500 ly sphere sector I just spend the
> entire night generating - it has over 400,000 systems, whereas a
> 500-ly sphere area around Earth only has roughly 42,000. We're looking
> at an order of magnitude more stars than one would expect, and I
> generated that system on the lowest setting. The sector was way too
> big to be anywhere near manageable - it was 3.15 gb (!!), and even
> trying to look at it in "Show hospitable systems only" lagged quite
> badly. This was far from ideal.
> Testing of the "Star Frequency" slider on 20/20/20 cubes produces star
> frequency and density which seems to be way out of whack with known
> models of space. The one I just generated for a test has 4,095 systems
> on "even" distribution at the highest setting - I imagine this would
> be something like what would happen close to the galactic core, but
> planets probably aren't habitable there, so we would really venture
> that close. "Clustered" on highest frequency produces a cube with 156
> systems, still a bit high, but more acceptable.
> I thought of a solution to fix this - I'm not sure how much work it
> would take, but I was thinking you could change the "Star Frequency"
> slider into two different ones, "Star Frequency/Amount" and "Star
> Density".
> "Star Frequency/Amount" would dictate the general amount of stars one
> would expect to find in the sector, and thus the general amount that
> whatever generation algorithm the program uses would be allowed to
> create. If possible, I'd like this to have some setting which is close
> to the star distribution we'd get around Sol.
> "Star Density" would dictate the general distance one would find
> between stars (which, depending on your star distribution template,
> would still vary widely). This would further modify the star frequency
> by only allowing a certain area of space to contain a certain number
> of stars. Again, I'd like this to have some setting that's close to
> what we'd find around Sol.
> Failing that, does anyone have any tips that I could use to make
> 500-ly spheres that don't have an unmanageably large number of stars?
> Sincerely,
> Andreus
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