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Old 07-17-2013, 09:35 PM   #1
Randomrocket
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Silas Morris
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Unhappy Cloud and smoke exposure problem

So I'm trying to make a video of a spaceship flying through the atmosphere and clouds and stuff. I have a daylight system set up with mr Sun and mr Sky and mr Photographic Exposure Control set to Outdoor Daylight, clear sky preset. The spaceship looks fantastic but I'm trying to create a smoke trail from behind it and clouds for it to pass through as it flies.

Here's a pic of it without any of the cloud stuff added.
Cloudless

Here's a pic of the smoke trail turned on:
Smoke trail

I'm using SuperSpray to make the smoke trail. I have the particles set to Facing and I'm using a standard radial gradient as an opacity map on the texture so it fades. But for some reason, I think the exposure whitens the edges. Is there any way to fix this? :(

Here's a pic of the smoke trail with the clouds turned on:
Clouds

I'm using volume fog for the clouds but the Exposure control just turns this to black and messes with the SuperSpray. Anything I can do to fix this? :( Or do you guys know of a tutorial that will give me realistic clouds with exposure control? I've tried lots of way but all of them seem to have a problem with Exposure Control and photometric lights.

Any help would be much appreciated.

Thanks,

Silas
 
Old 07-18-2013, 02:57 AM   #2
TheOnlyAaron
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Aaron Dabelow
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I am not sure what the specific conflict in your render is, probably some alpha or trace depth setting conflicting with atmospherics. But what your real solution should be is rendering your animation out in passes and compositing it together in something like AE or Nuke.

Once you switch to rendering in passes the world will open up to a lot of more options for you.
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Old 07-18-2013, 04:05 AM   #3
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Is there a method you recommend? I am using 3ds Max 2012. rpf files? My problem is that if the camera circles the spaceship, then I'm gonna run into problems of layering clouds and stuff around it.
 
Old 07-18-2013, 04:24 AM   #4
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I use .exr files for all my pixel storin' needs.
And to get things integrated like you mention, you'll need some matte objects. Look into the matte shadow material for how to cut out an alpha of objects that are layered in your smoke.
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Old 07-18-2013, 02:37 PM   #5
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Aight, thanks! I'll look into it.
 
Old 07-18-2013, 02:37 PM   #6
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