Cloud and smoke exposure problem

Become a member of the CGSociety

Connect, Share, and Learn with our Large Growing CG Art Community. It's Free!

Thread Tools Display Modes
  07 July 2013
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.

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:

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.


  07 July 2013
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.
Debris Maker
  07 July 2013
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.
  07 July 2013
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.
Debris Maker
  07 July 2013
Aight, thanks! I'll look into it.
  07 July 2013
Thread automatically closed

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.
CGTalk Policy/Legalities
Note that as CGTalk Members, you agree to the terms and conditions of using this website.
Thread Closed share thread

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Society of Digital Artists

Powered by vBulletin
Copyright 2000 - 2006,
Jelsoft Enterprises Ltd.
Minimize Ads
Forum Jump

All times are GMT. The time now is 07:05 AM.

Powered by vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.