Chaos Corona Forum

Chaos Corona for Cinema 4D => [C4D] General Discussion => Topic started by: kmwhitt on 2017-09-03, 21:14:02

Title: Portal Placement
Post by: kmwhitt on 2017-09-03, 21:14:02

The examples I've seen for proper placement of portals are simplistic.  My windows and doors are more complex than a hole in the wall.  In the attached diagram, do I use 5 separate portals as indicated by the green lines (actual glass openings) or one large portal as shown in red?  Thanks, Kevin

Title: Re: Portal Placement
Post by: burnin on 2017-09-03, 21:59:16

one is fine

Title: Re: Portal Placement
Post by: maru on 2017-09-04, 10:01:32

I would vote for the red one, however the best method if you want to squeeze as much performance as possible, would be to do both setups and compare render quality after the same time limit.

Title: Re: Portal Placement
Post by: kmwhitt on 2017-09-04, 18:06:11

There are over 40 windows in the scene.  When I have time later today, I'll test the differences on the noise levels.  Thanks for the responses.

Title: Re: Portal Placement
Post by: burnin on 2017-09-04, 19:32:51

Quote from: maru on 2017-09-04, 10:01:32

I would vote for the red one, however the best method if you want to squeeze as much performance as possible, would be to do both setups and compare render quality after the same time limit.

had done that :D
setting so many portals takes quite more time than what rendering with those saves you after
for me, session experienced & lesson learned - one large is enough

ps
openings need larger occlusion/barrier within to be worth splitting a portal into two or more (simply calculate between the area efficiency (gain VS loss) & the time to set consumed)
also, after latest development info, it looks like we are soon gonna be portal free ;)

Title: Re: Portal Placement
Post by: kmwhitt on 2017-09-04, 20:41:52

burnin - thanks for the reply.  It would take a long time to break down those openings.  Besides, I am getting fairly decent results within a couple hours.  Where did you read that they were doing away with portals?

Title: Re: Portal Placement
Post by: burnin on 2017-09-04, 22:37:39

in Chaos ;)
there are researching & experimenting with some more intricate sampling stuff (Corona got the latest speedup from them ;)

just don't hold your breath yet, for my soon can be years to you
although, if it all goes well, then by the end of the year (maybe sooner) news will hopefully reveal more

merger is good for lovers
:D

Title: Re: Portal Placement
Post by: houska on 2017-09-05, 09:49:49

Quote from: burnin on 2017-09-04, 22:37:39

merger is good for lovers
:D

Somehow I imagine a MLP meme with this quote :-D