Pictures from Celestia

General discussion about Celestia that doesn't fit into other forums.
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Cham M
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Post #141by Cham » 01.09.2016, 19:29

John Van Vliet wrote:to get a 4k image i would need to upscale the smaller 3200x1600 image
this was not created in blender, but a hacked version of "earthlike.c" from "space:nerds in space"

John,

how did you made the normal map for this ? We need a 4K version of it.
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John Van Vliet
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Post #142by John Van Vliet » 01.09.2016, 20:17

the normal was done using a 16 bit unsigned raw and NMSU , my hack of the nms tool for making a ppm from a simple cylindrical raw 16 bit SIGNED raw height map .

the same way i have made normalmaps for many years

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Cham M
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Post #143by Cham » 01.09.2016, 20:22

Then is it possible to redo the normal map of the previous texture, in 4k ?
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John Van Vliet
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Post #144by John Van Vliet » 02.09.2016, 02:56

ok a 35 meg zip with 3 4k maps
texture,normal, and 16bit heightmap
-- fixed error i thought i had fixed

https://drive.google.com/file/d/0B6ZYAd08tZL-emlMc2pDeEpNUUk/view?usp=sharing
Last edited by John Van Vliet on 02.09.2016, 04:18, edited 1 time in total.

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Cham M
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Post #145by Cham » 02.09.2016, 03:05

Wow ! That texture is awesome, John, thanks a lot ! :eek:

You should publish your last set of textures (mars-like, giant gas and asteroids/moons) to the Motherlode.
These textures are a must, for Celestia ! :smile:

Added after 4 minutes 37 seconds:
Hmm, John, I just noticed a seam on the normal map. The base texture is perfect (no seam), but the normal map has a defect on a side :
seam.jpg
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John Van Vliet
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Post #146by John Van Vliet » 02.09.2016, 03:17

thought i fixed that, Fixed NOW

new zip

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Cham M
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Post #147by Cham » 02.09.2016, 21:34

John, did you fixed the seam on your normal map ?

Here are two views of a strange world, in a far away galaxy (M31), with some nebulea visible in the background :
capt1.jpg

capt2.jpg


Both textures from John VV.

Added after 4 hours 2 minutes:
I was a long time that I didn't cruised into Celestia's space like this. What an experience ! :smile:

Three views from inside some sprites nebulae in two galaxies (M33 and M81) :
im1.jpg

im2.jpg

im3.jpg
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

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FarGetaNik M
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Post #148by FarGetaNik » 03.09.2016, 08:31

Cham wrote:Three views from inside some sprites nebulae in two galaxies (M33 and M81) :

I know Celestia is capable of that, why haven't I seen an addon yet? There are no sprite nebulae in default (except globular clusters and galaxies themselves if you count that). So how to use them?

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Cham M
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Post #149by Cham » 03.09.2016, 12:31

FarGetaNik wrote:I know Celestia is capable of that, why haven't I seen an addon yet? There are no sprite nebulae in default (except globular clusters and galaxies themselves if you count that). So how to use them?

The problem with sprites nebulae in Celestia 1.6.1 is that they are still rendered as a very luminous pixel while you are standing very very far away from the model. The sprites do not fade away with distance. The special Celestia 1.7.0 for OS X that I published elsewhere on this forum had fixed this important bug. It's a pitty that this version never got published as the official version, especially since it's 64bit ! See this thread :

viewtopic.php?f=4&t=17423

With Celestia 1.6.1, sprites nebulae could be used as SSC objects though, to represent small planetary nebulae for example.

Added after 4 hours 3 minutes:
By inverting the colors of John's texture, I could get a nice variation. This is usefeull for more variety in a system :

Left side of the picture below is John's original texture, with a color blending at the SSC level only :

Code: Select all

   Color [1 0.85 0.75]
   BlendTexture true

Right part of the picture is the same texture, inverted, with a bit more contrast and same color blending :
reverse.jpg


(This looks a bit like a planet that have gone thermonuclear war and lost all of its atmosphere ! :twisted: )
Last edited by Cham on 03.09.2016, 17:04, edited 2 times in total.
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

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FarGetaNik M
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Post #150by FarGetaNik » 03.09.2016, 16:58

Cham wrote:Right part of the picture is the same texture, inverted, with a bit more contrast and same color blending :

Maybe you could get some different structures by using a high-pass and combining it with a blurred and inverted copy.
personally I think the normal effect is to intense, so lowering the contrast in the normalmap (and maybe mirroring the set of textures) might give some more variety.

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Cham M
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Post #151by Cham » 04.09.2016, 00:48

Playing with John VV's textures, here are three "dramatic" views of a system in Andromeda's galaxy (M31) :
world1.jpg

world2.jpg

world3.jpg


Celestia is awesome to make views like these ! :smoke:

I need to place an alien probe in this system !
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

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Cham M
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Post #152by Cham » 04.09.2016, 03:03

There's so much worlds, out there ! :wink:

I'm rediscovering many worlds. I didn't explored Celestia's space since a pretty long time ...
cap1.jpg

cap3.jpg

cap4.jpg
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

Steve.Bowers
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Post #153by Steve.Bowers » 04.09.2016, 19:57

The Black Acropolis, a 'Snailshell' configuration Dyson swarm in Orion's Arm

Image



Each cylinder contains a separate environment, many times larger than a planet; they are linked into rings, each ring orbiting as a slightly different inclination.
http://www.orionsarm.com/eg-article/48000db9a9c2f

can be downloaded here
https://onedrive.live.com/redir.aspx?cid=9438a296 ... B!108&authkey=!AHfXTfgK2aGSmXY

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FarGetaNik M
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Post #154by FarGetaNik » 04.09.2016, 21:47

That's so beautiful :weirdface: I wonder if such a configuration was stable or of perturbations would cause it to collapse eventually.

Steve.Bowers
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Post #155by Steve.Bowers » 05.09.2016, 08:33

Even if they are subject to perturbations, there is plenty of available energy for stationkeeping. And to protect against comets.

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FarGetaNik M
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Post #156by FarGetaNik » 05.09.2016, 12:19

Steve.Bowers wrote:Even if they are subject to perturbations, there is plenty of available energy for stationkeeping. And to protect against comets.

This is only reasonable if they have a very small mass (hence low density) or their own gravity alone might cause chaos, considering they are planet-sized! I can believe the solar energy would be enough to counter external perturbations.

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Cham M
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Post #157by Cham » 06.09.2016, 02:28

The latest mars-like texture from John VV, in Andromeda's galaxy. I'll populate the sunlike stars close to a nebula model, for the views...
world.jpg
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_M-Explorer_
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Post #158by _M-Explorer_ » 20.11.2016, 07:01

Here is an image from Hades in the Avatar system by Milosz21:
Image

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Danny Lorraine II
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Post #159by Danny Lorraine II » 24.05.2018, 23:03

what happened to the images ? i can't look at them .
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