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Underdog
08-18-2015, 05:09 AM
Hello there,

I get reasonably good results with daytime renderings - atmosphere and clouds. The options in the UI leaves for good control over the result.

Not so for scenes at night.

Did someone successfully apply Skytracer for nighttime scenes? If so, which settings?

Thank you.

prometheus
08-18-2015, 06:03 AM
Hello there,

I get reasonably good results with daytime renderings - atmosphere and clouds. The options in the UI leaves for good control over the result.

Not so for scenes at night.

Did someone successfully apply Skytracer for nighttime scenes? If so, which settings?

Thank you.

would that nighttime be without clouds? which type of night time would it look like, any reference?
over here in sweden the night is cyan blue and not very dark at this time of the year, well it has started to be darker now...it all depends on month, clock etc.

it´s been a long long time since I used skytracer, using dp sunsky mostly...wich gives a much nicer sunset..evening light and sky settings, without clouds that is...you can mix with cloud maps and textured environment with sunsky, or use hypervoxels with sunsky.

so what do you got so far..can you show a bit of the daytime sample and nighttime sample?
would have to check later..maybe 4 hours from now and see what can be done.

Underdog
08-18-2015, 11:47 PM
Hello Prometheus,

Thank you very much for your reply.

I have no experience using cloud maps with hypervoxels. Would love to look into that, but have a big project to finish and little time for R&D.

I am using Skytracer with groundfog. It gives a nice result, but not at night time.

I use this baked image for daytime/afternoon:

129343

However, the adviser for the project wants a dark and murky nightsky, something like this:

129344

It is easy enough pasting any horizon onto a polygon and put it in the background, but with that comes limitations in choice of camera-angles.

I would like a dramatic night sky that preferably covers the scene 360º - like Image World.

We are producing a demo for what potentially can become an animated musical based on Kiss' «The Elder» album from 1981. We have some of the original Kiss-team with us as advisers.

I need a high quality night sky and fast. If you have some experience working with animated clouds and night skies, I would love to have you on-board. Your name would be credited alongside the rest of the team.

I would also be grateful for any further advice.

Thank you.

prometheus
08-19-2015, 01:38 AM
Hello Prometheus,

Thank you very much for your reply.

I have no experience using cloud maps with hypervoxels. Would love to look into that, but have a big project to finish and little time for R&D.

I am using Skytracer with groundfog. It gives a nice result, but not at night time.

I use this baked image for daytime/afternoon:

129343

However, the adviser for the project wants a dark and murky nightsky, something like this:


129344

It is easy enough pasting any horizon onto a polygon and put it in the background, but with that comes limitations in choice of camera-angles.

I would like a dramatic night sky that preferably covers the scene 360º - like Image World.

We are producing a demo for what potentially can become an animated musical based on Kiss' «The Elder» album from 1981. We have some of the original Kiss-team with us as advisers.

I need a high quality night sky and fast. If you have some experience working with animated clouds and night skies, I would love to have you on-board. Your name would be credited alongside the rest of the team.

I would also be grateful for any further advice.

Thank you.

First of all...I didn´t mention cloud maps with hypervoxels...but Dpont sunsky and cloud maps, Or use sunsky and hypervoxels.

..for that referenced darker cloud and skies..that would be hard to acheive with skytracer, think you would have to go with hypervoxels for that..the downsides are to mainly...rendertimes, and it often takes a lot of experience in months and monts to get decent results.

using image maps..requires either painting one, or find a large cloud map, there are some free ones to use, so you should try and find one that for instance works with cylindrical or sherical projection in textured environment, then you can rotate or move camera almost as you want...at least rotate it.

I am not at home now..but might be able to guide you to a map or so later...not sure if it will be today..but otherwise tomorrow..using lightwave without any special plugin like ogo taiki,ozone, or turbulenceFD, for realistic clouds..your best option is to find,purchase or take photage yourself of real cloud imagery.
hypervoxels will get you semi decent clouds.

I have loads and loads of cloud samples and discussed that in many many threads , everything from using hypervoxels sprites on geometry, hypervoxels volumes on points, hypervoxels on particle fields, nulls etc..using
TurbulenceFD to run simulations, which then are freezed so you can fly through it, use turbulenceFd to fill geometry shapes and add displacement noise to it.
using ogo taiki
using ozone.

since I am not home now...and I have other things to do now...I have to gather some stuff later, mostly links and advices though.

a problem with hypervoxels is that it is hard getting a realistic soft feathering whisp at only desired outer parts on some cloud areas while retaining a bit of fuller turbulence noise on the inside with more density.
you can tweak the hypertexture alone with some tricks..and you can add additionall cloud clusters with different settings..but it is hard to get it to mix realisticly.




regarding your skytracer..you would have to change atmosphere settings, thickness opacity luminosity etc to correct color and at least match the general color and light feeling, having such whispy and high pillar clouds would be very difficult to acheive..you have to set a cloud height a lot more ..and it takes a huge hit in rendering with skytracer..so til the point, that it may be more effective to sculpt cloud points, or use particles and use hypervoxels instead.

You can check my cloud experimental page..various techniques, if you find a certain image of interest..you can tell me and I will tell you what type of tecnique I used...
https://plus.google.com/photos/100944643113557837045/albums/5978023753291712209


various thread I started...
http://forums.newtek.com/showthread.php?146615-Atmospherics-with-dpont-sunsky-sprites-soft-cloud-whisps-fog-and-related&highlight=clouds


http://forums.newtek.com/showthread.php?141094-Heart-of-hypervoxels-expanding-on-hypervoxel-shapes&highlight=clouds


Ideally ..you would want something like this, which may be possible with turbulenceFD plugin for lightwave..but it costs.
http://forums.newtek.com/showthread.php?142596-Clouds-from-fluids&highlight=clouds

http://www.youtube.com/watch?v=QKe8eGM_3LE

meshpig
08-19-2015, 02:20 AM
Well, you get the moon happening by using a distant light with volumetrics/attenuation set low so it's like a coin. The rest is more or less axiomatic in terms of the texture options and backdrop but be warned, it's a slow process :)

gerardstrada
09-30-2015, 07:24 PM
Hello there,

I get reasonably good results with daytime renderings - atmosphere and clouds. The options in the UI leaves for good control over the result.

Not so for scenes at night.

Did someone successfully apply Skytracer for nighttime scenes? If so, which settings?

Thank you.

Probably way too late, but will share it anyway. You might want to use a 'Day-by-Night' approach.

http://s14.postimg.org/kkj8rp75t/nighttime.gif

For the clear sky base you can use DP Sunsky with very low values in Turbidity to simulate very clear sky. Use The Node Texture in Procedural texture within TextureEnvironment. There we are able to mix several solutions. You can add a stars layer (I'm using the milkyway HDRI courtesy by Christian Bloch (http://www.hdrlabs.com/sibl/archive.html) for the sample). On top of that you can add real clouds from a HDR pano (check out Bob Groothuis (http://www.bobgroothuis.com/blog/category/dutch_skies_360_online_shop/) Dutch Skies). You can color key the clouds with DP Color Key node (courtesy by Denis Pontonnier (http://dpont.pagesperso-orange.fr/plugins/nodes/nodes/Misc.html#ColorKey)). The setup looks something like this:

http://s4.postimg.org/rsqx9q7n1/skysetup.png

Additionally (if you want slow moving clouds) you could use a sequence modified with Liquify tool or similar.



Gerardo

shrox
09-30-2015, 08:18 PM
Probably way too late, but will share it anyway. You might want to use a 'Day-by-Night' approach.

http://s14.postimg.org/kkj8rp75t/nighttime.gif

For the clear sky base you can use DP Sunsky with very low values in Turbidity to simulate very clear sky. Use The Node Texture in Procedural texture within TextureEnvironment. There we are able to mix several solutions. You can add a stars layer (I'm using the milkyway HDRI courtesy by Christian Bloch (http://www.hdrlabs.com/sibl/archive.html) for the sample). On top of that you can add real clouds from a HDR pano (check out Bob Groothuis (http://www.bobgroothuis.com/blog/category/dutch_skies_360_online_shop/) Dutch Skies). You can color key the clouds with DP Color Key node (courtesy by Denis Pontonnier (http://dpont.pagesperso-orange.fr/plugins/nodes/nodes/Misc.html#ColorKey)). The setup looks something like this:

Additionally (if you want slow moving clouds) you could use a sequence modified with Liquify tool or similar.



Gerardo

That looks nice.

prometheus
10-01-2015, 08:51 AM
yes..that is nice Gerardo, been testing some mixing of the sunsky only and image maps too, will take a look at your nodes later and specificly color key the clouds..it´s looking good, though it is an alternative and not a skytracer night, but migth be a better one..definitly faster one at least.

Michael

gerardstrada
10-01-2015, 07:05 PM
Hello Shrox, Thanks!
Yes Michael. Totally agree, the day-for-night approach is just a hack.

For improving the hack, we have the additional chance of using an adapted colorsystem version, and a more plausible "moon"/sky ratio intensity in DP Sunsky.



Gerardo