Star textures

[cubicApoc]

A set of star textures I made in Grand Designer. There's an alternate A-class texture in there if you like starspots.

O, B, A, F, G, K, M, C

Wolf-Rayet, L, T, Y

Download (8K)
Download (4K)

[Trolligi 112477]

epic

[trappistplanets]

Ooof
the color of your gstar texture is to yellow
look at FGN's texture
its a whitish color

in reality g-type stars are white not yellow

[jujuapapa]

Ooof
the color of your gstar texture is to yellow
look at FGN's texture
its a whitish color
in reality g-type stars are white not yellow

All depends of your point of view... from Earth or from space ?

[FarGetaNik]

Oh those look quite epic! At first glance the colors look fine but maybe gonna experiement around a bit and adjust for spectral colors.

The texture looks quite good but a minor complaint id have is the scale of features around the mid main sequence is probably too big. The sun's granules are way smaller than that.

[bh]

These look fantastic! Great job.

[trappistplanets]

All depends of your point of view... from Earth or from space ?

in space g-type stars are not yellow there white
so that texture needs fixing

[Gurren Lagann]

There is a little thing that apparently very few people are aware of nowdays.
Its a little thing called something like... What was it... Oh yeah, creative liberties!

[fyr02]

by trappistplanets » Today, 07:14
in space g-type stars are not yellow there white
so that texture needs fixing

Celestia's textures are massively darkened anyway - if it was darkened to that degree then the sun would in fact look yellowish.

[jujuapapa]

All depends of your point of view... from Earth or from space ?

in space g-type stars are not yellow there white
so that texture needs fixing

And A-type star, what is its color ? Transparent ?

[SevenSpheres]

And A-type star, what is its color ? Transparent ?

Blue

[jujuapapa]

And A-type star, what is its color ? Transparent ?

Blue

False, white !

Blue is for O and B type stars.

[SevenSpheres]

False, white !

Blue is for O and B type stars.

http://vendian.org/mncharity/dir3/starcolor/details.html wrote:

> > > Descriptions of stellar types often say things like "yellow".

> > Those 'yellow' stars are white, and what are usually termed 'red' stars are
> > yellow to yellow-orange. Stellar types are defined using for calibration the
> > blue star Vega, which provides an extremely simple spectrum at the '0'
> > magnitude. The colors assigned stars were never intended to have any
> > relationship to reality, but simply showed the temperature relative to Vega.
> > Thus we have the seeming absurdity of our overwhelmingly, brilliantly white
> > Sun being called a 'yellow' star.

> Fascinating. What an unfortunate naming scheme.
> I wonder if it started out fully qualified ("Vega-yellow", "yellow
> relative to Vega"), and then degraded, or whether correct interpretation
> always presumed domain knowledge. At this point, judging by some of the
> colors used in stellar type tables by astronomers teaching intro
> astronomy classes, this context is sometimes forgotten even within the
> profession. And outside... what a mess.

It did [presume domain knowledge], but that 'domain' was originally
comprised of astronomers doing photometry who would presumably
understand the system.

Added after 12 minutes 28 seconds:
So in other words, descriptions of star colors often use Vega (a blue, A-type star) as the white point. Relative to Vega, the Sun is indeed yellow, but as we see it, it's white. Here is Mitchell Charity's page specifically on the color of the Sun. More recently, Askaniy has done some work on calculating colors from spectra, resulting in an even more white color for the Sun:

and of course, blue for Vega:

[jujuapapa]

Just remember only this :

A basic scientific document since several centuries...

[SevenSpheres]

Just remember only this :

A basic scientific document since several centuries...

You're claiming that an H-R diagram with Vega-relative colors is a more authoritative source than Mitchell Charity's and Askaniy's work on spectra (which have been and will be used in Celestia)?

Edit: I could also just post a true-color HR diagram...

[jujuapapa]

You're claiming that an H-R diagram with Vega-relative colors is a more authoritative source than Mitchell Charity's and Askaniy's work on spectra (which have been and will be used in Celestia)?

Yes !

Who does he know these two men ?
A google's search didn't give none result...
What are their last publications ?

Ignore the HR diagram and later you'll say that the Earth is flate...

[fyr02]

Yes !

Color gradients like the D65 Spectrum are shown to be better approximations of true blackbody colors than a Vega-relative spectrum... For example here's the approximate color of Vega on a D65 gradient, where you can see Vega is clearly a blue color.

[cubicApoc]

The sun's granules are way smaller than that.

I'm well aware of that, but that's the highest GD would let me set the noise scale. That scale also lets me tweak the granule noise without having to re-bake the texture every time, as GD only shows a low-res preview while you're editing.

[Trolligi 112477]

Jujuapapa, the sun isn't yellow in any case. It's nearly white.

Also the H/R diagram's colours are exaggerated.

[jujuapapa]

LOL , less 20 years old and they knew their grandfather as a young man! !!!

Stop, go to university before writing stupidity...