Introduction to Maya - Modeling Fundamentals Vol 2
This course will look in the fundamentals of modeling in Maya with an emphasis on creating good topology. It's aimed at people that have some modeling experience in Maya but are having trouble with complex objects.
Watch
# 1 09-03-2014 , 01:30 PM
Registered User
Join Date: Dec 2013
Posts: 52

Object_light in Mental Ray

Does anyone knows how to create mesh light in Mental Ray. I am not looking for "emit_from_surface" node because it is a way to slow to render with Final Gather. I found this article : https://elementalray.wordpress.com/20...ntal-ray-3-11/

but because I am newbie I really don't understand how to create this "buildin" node !

Can someone help me with this ?

user added image
 
Quote
# 2 09-03-2014 , 08:26 PM
Gen's Avatar
Super Moderator
Join Date: Dec 2006
Location: South FL
Posts: 3,522
He tells you how in the article. Copy and paste the declare code he posted in a normal text file, save, change the txt extension to mi and drop it in the include folder. Start Maya and make sure it's loaded and it will be in the Mental Ray shader category in Hypershade.
- Genny
__________________
::|| My CG Blog ||::
::|| My Maya FAQ ||::
 
Quote
# 3 10-03-2014 , 02:08 PM
Registered User
Join Date: Dec 2013
Posts: 52
I can't compile it because I have no idea what the "transform node" is ?

"The simple workflow is:

Assign builtin_object_light material to Object -> create area light -> attach area light .message to Light parameter of builtin_object_light shader. (This picture needs updated below, you should attach the transform, not the shape)"
 
Quote
# 4 10-03-2014 , 04:31 PM
Gen's Avatar
Super Moderator
Join Date: Dec 2006
Location: South FL
Posts: 3,522
The "transform" is the node that stores the object's move/scale/rotate information.
- Genny
__________________
::|| My CG Blog ||::
::|| My Maya FAQ ||::
 
Quote
# 5 10-03-2014 , 06:00 PM
Registered User
Join Date: Dec 2013
Posts: 52
do you mean this one :
Attached Images
 
Quote
# 6 10-03-2014 , 06:13 PM
Gen's Avatar
Super Moderator
Join Date: Dec 2006
Location: South FL
Posts: 3,522
Yep, that's the one.
- Genny
__________________
::|| My CG Blog ||::
::|| My Maya FAQ ||::
 
Quote
# 7 11-03-2014 , 12:08 PM
Registered User
Join Date: Dec 2013
Posts: 52
well, this was the node I did connect to the light but it doesn't work. I am not able to increase light intensity. The object does start to look as emitting light but the light is really low and no matter how much I increase it just stays at the same light intensity.
 
Quote
# 8 11-03-2014 , 12:09 PM
Registered User
Join Date: Dec 2013
Posts: 52
Did you ever try this node ?
 
Quote
# 9 11-03-2014 , 11:42 PM
Gen's Avatar
Super Moderator
Join Date: Dec 2006
Location: South FL
Posts: 3,522
Yes, I followed the instructions and it worked for me.
user added image
- Genny
__________________
::|| My CG Blog ||::
::|| My Maya FAQ ||::
 
Quote
# 10 12-03-2014 , 12:15 AM
Registered User
Join Date: Dec 2013
Posts: 52
What is it exactly you connect from the transform node? It seems I am missing something. Sorry I am really new in working with nodes ! Does it matter the scale of the scene ? My scene is huge !
 
Quote
# 11 12-03-2014 , 09:20 PM
Gen's Avatar
Super Moderator
Join Date: Dec 2006
Location: South FL
Posts: 3,522
-In Hypershade, middle click drag and drop the area light transform node onto the builtin_object_light node
-Choose "other" from the pop up menu
-When the connection editor pops up, click on the "left display" and "right display" menus on the top of the editor and make sure "show hidden" is checked on in both.
-In the left column, you should see "message" at the top of the list, click it.
-In the right column you should see "light" in the list, click it
-close the editor.


If your light is set to decay then yes the scene scale matters.
- Genny
__________________
::|| My CG Blog ||::
::|| My Maya FAQ ||::
 
Quote
# 12 20-02-2015 , 02:23 PM
Registered User
Join Date: Feb 2015
Posts: 3
Sorry, i have to readopt this subject.
I try to follow the same article. (https://elementalray.wordpress.com/20...ntal-ray-3-11/)

(Assign builtin_object_light material to Object -> create area light -> attach area light .message to Light parameter of builtin_object_light shader. (This picture needs updated below, you should attach the transform, not the shape))

How to assign the Node to the Object?

Please help.

user added image
Last edited by Gallow; 20-02-2015 at 02:29 PM.
 
Quote
# 13 23-02-2015 , 03:12 PM
Registered User
Join Date: Feb 2015
Posts: 3
Attached Thumbnails
 
Quote
# 14 23-02-2015 , 05:56 PM
Registered User
Join Date: Dec 2013
Posts: 52
honestly, I don't remember how I have succeed here, give me a day to find the project and I will send you MB file with the node innit !user added image relax user added image
 
Quote
# 15 23-02-2015 , 07:20 PM
Gen's Avatar
Super Moderator
Join Date: Dec 2006
Location: South FL
Posts: 3,522
You assign it just like you would any other surface shader. Middle mouse drag and drop or right click it in Hypershade and select assign to selected objects etc. I'm sure it was mentioned in the tutorial but I'll repeat it here, in the builtin light shader's shading group node, under the "custom shaders" section, uncheck "export with shading engine". Should work fine.
- Genny
__________________
::|| My CG Blog ||::
::|| My Maya FAQ ||::
 
Quote
Reply to this thread
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
Previous Thread
Next Thread

Similar Threads

What happened to the Mental Ray? by SilverFeather in forum Maya Basics & Newbie Lounge replies 10 on 07-12-2011 Why Maya? by haka in forum Maya Basics & Newbie Lounge replies 21 on 10-11-2007 Mental Ray again! by Mayastatic in forum Maya Basics & Newbie Lounge replies 3 on 09-10-2007 Big Mental Ray Problem by Hoshi87 in forum Maya Technical Issues replies 4 on 03-04-2007 Mental Ray OS X Issues(Batch Render) by Bigfat in forum Maya Basics & Newbie Lounge replies 1 on 13-05-2003

Topics

User:
New tutorial - Create tileable textures from photos. Photoshop to Alchemist to Maya 2 By David Site News & Announcements
3
User:
Bitcoin as payment method By David Site News & Announcements
4
Site no longer updated? By MacNimation Site News & Announcements
0
User:
Get 100 free Maya models for cartoon sets By Nilla Site News & Announcements
17
User:
Two new free character rigs for Maya By Nilla Site News & Announcements
3
User:
Email Issues By David Site News & Announcements
1

Free Courses

Maya 2020 custom shelf with scripts Image
Maya 2020 custom shelf with scripts
Texture collaboration and download system Image
Texture collaboration and download system
Bifrost cloth simulation Image
Bifrost cloth simulation
Principles of UV mapping in Maya 2020 Image
Principles of UV mapping in Maya 2020

Full Courses

Digital humans the art of the digital double Image
Digital humans the art of the digital double
Maya 2020 fundamentals - modelling the real world Image
Maya 2020 fundamentals - modelling the real world
Maya for 3D Printing - Rapid Prototyping Image
Maya for 3D Printing - Rapid Prototyping
Integrating 3D models with photography Image
Integrating 3D models with photography

VFX News

How computer animation was used 30 years ago to make a Roger Rabbit short On 2022-07-18 14:30:13
Sneak peek at Houdini 19.5 On 2022-07-18 14:17:59
VFX Breakdown The Man Who Fell To Earth On 2022-07-15 13:14:36
Resident Evil - Teaser Trailer On 2022-05-13 13:52:25
New cloud modeling nodes for Bifrost On 2022-05-02 20:24:13
MPC Showreel 2022 On 2022-04-13 16:02:13