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 Post subject: Re: ceres
PostPosted: Wed, 04-11-15, 3:41 GMT 
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a few renderings of hamo 51 PIA19993.tiff

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height map used
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 Post subject: Re: ceres
PostPosted: Sat, 07-11-15, 7:21 GMT 
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repost from UMSF

HAMO-54
this one works well for sfs

renders at a low angle
Image Image Image Image

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 Post subject: Re: ceres
PostPosted: Wed, 16-12-15, 5:25 GMT 
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hamo 70
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google photo album
https://goo.gl/photos/8Aqqcb8CxZ8WG5456

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 Post subject: Re: ceres
PostPosted: Sun, 17-01-16, 6:13 GMT 
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so low traffic so just a few pretty pictures

a few low angle views from LAMO-6
PIA20296
Image Image Image Image

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 Post subject: Re: ceres
PostPosted: Sun, 17-01-16, 9:10 GMT 
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Just gorgeous, John!

I am sure, a number of users including myself would much appreciate if you could remind us from time to time about the technique you applied to achieve these 3D renderings. Notably how the shapes of the underlying models are obtained...

Are these renderings fast enough to be used in Celestia / celestia.Sci?

Fridger

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 Post subject: Re: ceres
PostPosted: Tue, 19-01-16, 4:24 GMT 
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for those that also fallow the UMSF Ceres HAMO and now LAMO threads there are only a few of the 84 hamo that really are good candidates for "Shape From Shade ".
The "icy/salt" bright spots need to be painted out and the view NEEDS to be strait down .
I also make NO claims on scientific accuracy seeing as these are NOT map projected to remove camera tilt and i have to guess on the angles .

the Heightmaps are a blend of the outputs of two different programs
one a old minimization c code for a paper and a Matlab few lines that need to be ran through ISIS3's "dstripe" ( TWICE)
the lamo-6 above is a good example ( 8 bit copies of the 32 bit floating point images )

-- the matlab code
Image
after destripping and a HighPass
Image
the minimization using FFT and then a HighPass ( less detail ) but better over all shading
Image

blended and a bit of Gaussian noise added and some of the major SFS artifacts cleaned up
Image

i am using scripts to run these and they take about 15 min for a 1024x1024 image

PART 2

importing into Blender
( there is a ton of info on the web for using a displacement map and import " images as planes" plugin )
i am using "Cycles Render" and Nodes
just the mesh , then with the texture and lighted using the same angles for the sun as used for the SFS
Image Image


above i mentioned i add a small bit of Noise to the DEM
this is a good example - from "PIA20129-HAMO66"
https://picasaweb.google.com/lh/photo/m ... directlink

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 Post subject: Re: ceres
PostPosted: Tue, 19-01-16, 7:35 GMT 
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Thanks! That gives some idea, I'd say. Unfortunately ;-) nothing seems to go without Blender...

Fridger

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 Post subject: Re: ceres
PostPosted: Wed, 17-02-16, 0:39 GMT 
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LAMO - 27
http://photojournal.jpl.nasa.gov/catalog/PIA20381

Image Image Image

Image Image Image

and a Google photo album of My LAMO renders
https://goo.gl/photos/iAtFUPmE4QVxpcY29

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 Post subject: Re: ceres
PostPosted: Mon, 22-02-16, 1:27 GMT 
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Lamo 30 - PIA20384

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 Post subject: Re: ceres
PostPosted: Fri, 11-03-16, 6:30 GMT 
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for lamo "PIA20348"
this is what i get in Blender

Image Image Image Image

Image Image Image
and a 8bit copy of the heightmap
Image

and A few close-ups of the mount -- rotating around it
Image Image Image Image

Image Image Image

Image Image

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 Post subject: Re: ceres
PostPosted: Fri, 11-03-16, 7:29 GMT 
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Amazing, John! Would be great if somehow we were able to integrate this close-up 3D imaging into celestia.Sci... ;-)

Fridger

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 Post subject: Re: ceres
PostPosted: Fri, 11-03-16, 16:53 GMT 
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The last one is a 4k x 4k mesh with a texture draped over it
so it is big

there are a few ways to create a mesh on the fly using LOD and a dem

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 Post subject: Re: ceres
PostPosted: Sat, 19-03-16, 13:25 GMT 
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Hi John.
Today's APOD here
http://apod.nasa.gov/apod/ap160319.html
shows a very nice anagliph 3D of Ahuna Mons on Ceres.
Enjoy.
Goofy :)

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 Post subject: Re: ceres
PostPosted: Fri, 01-04-16, 2:53 GMT 
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LAMO 53

a few renders at a low angle

Image

Image Image Image Image

Image Image Image

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