Beer glass scene creation
This course contains a little bit of everything with modeling, UVing, texturing and dynamics in Maya, as well as compositing multilayered EXR's in Photoshop.
# 1 07-11-2011 , 06:15 PM
murambi's Avatar
Head of 3d Admedia
Join Date: May 2007
Location: nairobi , ken-ya
Posts: 1,339

Vegetation

Hey so got some Advice from one of the site's members called the Duke on a forum that talks about grass and trees in 3d and how to render them realistically. so after days of research and going through the pages this is what I have come up with so far. I need my grass to look as realistic as possible so any tips and tricks that you think may help please post away


I created the grass with maya paintfx then converted it to polygons. Because of the high poly count I ended up using mr proxy so any advice on how I might make this Image better

Attached Thumbnails
# 2 07-11-2011 , 07:42 PM
THExDUKE's Avatar
Registered User
Join Date: Sep 2011
Location: Germany
Posts: 98
Gamma Correction? Shadersetup? Texturevariation...depends maybe on your needs but I have 4 different leaftextures in my shadernetwork. You maybe want transparency and translucency on your grass. But actually it does not look that bad. Are you using mib_binaryproxy?

# 3 07-11-2011 , 08:13 PM
honestdom's Avatar
The Nurb Herd
Join Date: Oct 2007
Location: London
Posts: 2,381
i agree gamma correct.
also, maybe paint out the boat on your background, line up your camera better so you cant see the edges of the poly plane. Adjust your FG settings to get rid of the blotches.
I like it. how long was the render? i guess that method would be best suited to still frames?

# 4 07-11-2011 , 09:34 PM
Jay's Avatar
Lead Modeler - Framestore
Join Date: Feb 2003
Location: UK
Posts: 6,287
Murambi: Link???

# 5 08-11-2011 , 06:36 AM
murambi's Avatar
Head of 3d Admedia
Join Date: May 2007
Location: nairobi , ken-ya
Posts: 1,339

Gamma Correction? Shadersetup? Texturevariation...depends maybe on your needs but I have 4 different leaftextures in my shadernetwork. You maybe want transparency and translucency on your grass. But actually it does not look that bad. Are you using mib_binaryproxy?

Used mr_proxies, switched to mip_binaryproxy and the ram usage went extremely down. Will do a few more tests then post later in the day

i agree gamma correct.
also, maybe paint out the boat on your background, line up your camera better so you cant see the edges of the poly plane. Adjust your FG settings to get rid of the blotches.
I like it. how long was the render? i guess that method would be best suited to still frames?

Took 1min 36 sec on my i7 980x. I will adjust the fg setting for the final shot as this are just test renders

Murambi: Link???

Here is the link has like 67 pages but its worth it I really think simplymaya should do a tutorial on this because Its not information that you can easily come by https://forums.cgsociety.org/showthre...2&page=1&pp=15

# 6 08-11-2011 , 11:53 AM
Gen's Avatar
Super Moderator
Join Date: Dec 2006
Location: South FL
Posts: 3,518
Proxies can be pretty awesome, seeing RAM usage drop to nothing is so sweet. Apart from the FG blotches the lack of bounce light isn't helping to sell the image. How are you going about your linear lighting?


- Genny
__________________
::|| My CG Blog ||::
::|| My Maya FAQ ||::
# 7 08-11-2011 , 01:11 PM
murambi's Avatar
Head of 3d Admedia
Join Date: May 2007
Location: nairobi , ken-ya
Posts: 1,339
There are no textures just multiple Ramps for the grass. Should I gamma correct those I didnt think it was necessary or even possible


Last edited by murambi; 08-11-2011 at 03:14 PM.
# 8 08-11-2011 , 01:58 PM
Gen's Avatar
Super Moderator
Join Date: Dec 2006
Location: South FL
Posts: 3,518
The conclusion I've come to is that any color that's not at full saturation needs gamma correction.


- Genny
__________________
::|| My CG Blog ||::
::|| My Maya FAQ ||::
# 9 08-11-2011 , 04:07 PM
murambi's Avatar
Head of 3d Admedia
Join Date: May 2007
Location: nairobi , ken-ya
Posts: 1,339
Hey Guys does anyone have any experience with mia_exposure_photographic Its really kicking my ass...Im getting flat renders when I use it instead of mia_exposure simple

# 10 08-11-2011 , 09:31 PM
Subscriber
Join Date: May 2009
Location: Jaen, Spain
Posts: 208
I use it sometimes.
What i do is to crank up the cn2 factor until you see something, then tune it as you would do with a real reflex camera (shutter,f number, film iso). The other settings are kind of color correction, and the gamma that you have to correct in every texture, not in the lens shader.

this render is using it:


https://features.cgsociety.org/newgal...0602_large.jpg


In the maya documentation there is an article called "Camera- and Exposure Effects" that explain nicely how to use it. It is in the mental ray for maya architectural guide, in the mental ray section.


Last edited by taquion; 09-11-2011 at 01:08 AM.
# 11 08-11-2011 , 10:02 PM
Gen's Avatar
Super Moderator
Join Date: Dec 2006
Location: South FL
Posts: 3,518

Hey Guys does anyone have any experience with mia_exposure_photographic Its really kicking my ass...Im getting flat renders when I use it instead of mia_exposure simple

Try boosting the color burn a bit.


- Genny
__________________
::|| My CG Blog ||::
::|| My Maya FAQ ||::
# 12 09-11-2011 , 08:56 AM
THExDUKE's Avatar
Registered User
Join Date: Sep 2011
Location: Germany
Posts: 98
Some things you have to remember when using the mib_binaryproxy: ALWAYS switch to raytrace instead scanline, ALWAYS use BSP2. Thats the most significant powerboost ive seen so far. I have made tests with a grass area about 150m x 80m and there were about 28000 grasspatch-proxies there and rendering with scanline or without BSP2 is just impossible...but with the correct settings it rendered in 20minutes for a resolution in almost 5k!
The exposure photographic is a b*tch but I use it everytime. Although I dont understand quite the difference between the arbitary mode and the photographic, since the cm2 setting simply does not make sense to me...however the entire node is better to understand and to compare with realworld photography as the gain, pedestal stuff, imho!

For exterior try a cm2 of 10.000 ISO 100 shutterspeed 150 and a fstop of 11 or 12...On my needs I sometimes crank up the crushblacks to 1 and play around with the saturation and the burn highlights aswell a bit.

Posting Rules Forum Rules
You may not post new threads | You may not post replies | You may not post attachments | You may not edit your posts | BB code is On | Smilies are On | [IMG] code is On | HTML code is Off

Similar Threads