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Cartesius
07-23-2003, 08:52 AM
People,
I've put together a simple tutorial describing a method to render regions of a scene. Let's say you've rendered a radiosity scene and the final image took 10 hours to produce. Now you discover that you need to change the texture on one of the objects. You can't isolate the object and render for composite because of ambient lights or reflections or shadows or colour bounces or whatever and that's when it's pretty handy to render just a region of the scene -- you change your texture and isolate what will be rendered.

It's pretty basic and it's not "official" yet (haven't announced it on the index page yet) but wanted some feedback so check it out if you've got the time.

Tutorial: render region (http://www.cartesiuscreations.com/tutorials/render_tut/render_region.html)

/Anders Kjellberg

Per-Anders
07-23-2003, 08:58 AM
Great idea and tute :)

station75
07-23-2003, 09:00 AM
Hello

very cool method to decrease render time, i think that You should link it up with index.html file :)

JamesMK
07-23-2003, 09:13 AM
Very neat idea! I can easily see how something like that would be cleverly integrated in a future Cinema release, like "render to picture viewer using lasso/polygon mask"

lllab
07-23-2003, 09:19 AM
thanks for the tutorial,

but i have one maybe dumb question:
why dont you use the foreground objekt, with an quick mask? this is the way i do renderregions in cinema.

you take the image, make a quick mask in psd, put into the forground objekt. and you can render a region.
for me this was a very fast way to repair details of the image, or to get a high res preview of a region

i think this should also work with radiosity, but i am not quite sure.

i will test sometime if the forground objekt with a black mask also works for radiosity images. i think this would be an optional method to yours...

cheers

stefan
lllab

Gerry
07-23-2003, 09:26 AM
Cool, great job Cartesius
:thumbsup:

Cartesius
07-23-2003, 09:45 AM
Thanks guys, I will link it with the index-file as soon as possible :)

@stefan: yes, using a Foreground Object with a psd-file is a pretty neat trick as well and should work with radiosity without any glitches. I find that using a polygonal plane gives you more freedom "on the spot", so to say. You're working in Cinema all the time without needing to switch to Photoshop and you can move/add objects without guessing where their mask will be in Photoshop. I guess it comes down to preferences and workflow :)

/anders

manlio
07-23-2003, 09:51 AM
Very good tut Cartesius. Thanks. :)

Deestrakt
07-23-2003, 02:21 PM
oh thats smart !
thx for sharing this :thumbsup:

STRAT
07-23-2003, 02:24 PM
yup. i been using this 'letter box' region method for over a year now.

i hope maxon include 'render region to file', for large renders in particular, in future releases, together with a render backwards feature.

lllab
07-23-2003, 03:35 PM
hi cartesious,

yes its defenitly a matter of taste, but i dont have to guess where the mask should be, i just paste the screenshot into psd select exactls the area where i want to render, invers selection, fill it black- eh voila the mask is ready.

to my taste this is as exact and easy as with your method, i think people will choose which one they like, both are a simple way to render a region:-)

i use my metod also to render stills across the netrender, this was not invented by myself, it was posted somewhere, but i forgot who it was.

i really whished maxon would build something like this into a next cinema update, to automate it.

cheers, and thanks for the tutorial:-)

lllab
stefan

flingster
07-23-2003, 04:14 PM
very crafty both methods...thanks for the tips and tut..appreciated.
:beer:

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