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Underwater scene setup tips...

Posted By bruceberg 2 Weeks Ago
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bruceberg
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Hi Kids...I'm about to set up a scene where my grandkids rescue their father from certain drowning. I've searched high and low for any tutorials or tips on how best to do this, but have come up empty. So I'm going to wing it using lighting and focus for starters. If anyone has any tips or tutes, I would be very appreciative.
Regards...Bruce
Kelleytoons
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This probably isn't any help at all, but I've yet to find really convincing underwater scenes done in iClone.  What iClone is missing to make it right is either volumetric lights and/or light caustics.

In Max, for example, we'd just put a caustic video in the lights, but iClone had no ability to do this, and without it it's VERY difficult to get convincing underwater lighting (which can sell such a scene).  The few things I've seen people render do their best with fog in an effort to emulate that "cloudy water" appearance, and that's helpful, but hardly convincing.  Even iRay won't solve this problem, so that's most likely the best you can do.

If someone has better ideas I'd love to hear them, but the lack of caustics is a killer here.
sonic7
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@bruceberg .... It looks like your grandkid's father's 'drowning' may not be as 'certain' as it would seem .... given the *lack* of convincing water!!!  lol  BigGrin
Your searches have come up 'empty' and mine turned up 'dry'  BigGrin
Anyway, enough of my silly nonsense! ....
Well this IS interesting - the idea of emulating water with lighting - Good luck with that!!! w00t
(I have a *feeling* Mike's 'on the money' with his summation)
Seriously - the (only) time I ever needed convincing water - I ended up turning to Eon 'Vue' (their 'Pioneer' version I think). I don't even know if they still do a 'freebie' version - but at the time, you could 'export out' (up to a certain resolution/frame size if I recall correctly) without their 'watermark' - and that was still 'usable'. Just a thought .... Smile     (and  .......  please excuse my nonsense).

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2 Weeks Ago by sonic7
bruceberg
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Hi Kids...I actually ended up changing the color of the sky to approximate the color of my ocean and then slightly blurring the camera. Then I put my characters in the sky and changed my camera to point at an angle upwards. I'm putting faith in the viewer to imagine being underwater, while I get my actors to the ocean surface as quickly as possible. I decided not to spend more than a day trying to do what apparently can't be done. (so unlike me...I must be maturing)
Regards...Bruce
sonic7
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That's great .... you've certainly surprised me .... and I'd be very keen to see the end result if you choose to air it ...
Steve. (On re-reading my reply above, I'm somewhat regretting my silly humor ... but hey --- I am really glad you found a solution Bruce).

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2 Weeks Ago by sonic7
Kelleytoons
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If you do a web search for Underwater Caustics you'll see what I mean.  Here's a tutorial on doing it in AE:



This really demonstrates why we need volumetric lighting in iClone (sigh).
gordryd
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For what it's worth...I used the 3DScene > Mesh Medium > Canyon, moved the camera underwater, added some fog, plants, and rocks.  The water animates nicely adding distortion to the above surface objects (and the plants 'sway' in the current), but it is missing caustics on the bottom.  You could try animating a pattern in front of the light souce to fake caustics. - Gordonhttps://forum.reallusion.com/uploads/images/b73e9e0a-c761-4f49-b5e5-9d0f.jpg
Kelleytoons
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I've tried putting something in front of the lights but it doesn't help with caustics, which are really needed for selling the effect.  I used a plane and mapped it with caustics, I've tried displacements, everything you can think of short of something physical (IOW, some snake-like physical mesh that moved like caustics -- that might be the solution if I could figure out how to generate it).

Someday I may revisit this, but I hope volumetric lights show up in the meantime (which *might* be able to be mapped correctly to show caustics).
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2 Weeks Ago by Kelleytoons
mark
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I "faked" an underwater sequence awhile back in iC5 with this old Jungle Girl clip. Bubble particles definitely help along with moving light-shadows and don't forget fish!!!



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2 Weeks Ago by mark
sonic7
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Hey Mark! That's *really* well done!! The whole 'experience' - imagery plus sound - really 'takes you there' - loved it !!!




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