SimplyMaya Forums

Welcome to the forum, feel free to ask questions here.

Home / forum / Lighting & Rendering, Dynamics & Effects, Texturing / Mental Ray / Mental ray: Reflections (don't want inside reflection)
Register FAQ Members List Calendar Mark Forums Read

New Thread
 
Thread Tools
Old 14-04-2012, 06:01 PM   #1
karelvdz
Registered User
 
Join Date: Apr 2012
Posts: 6
Thanks: 0
Thanked 3 Times in 3 Posts
Default Mental ray: Reflections (don't want inside reflection)

Hi there!

As u can see in the attached image, the back of the bubble is reflecting the text + it reflects the HDRI.

Is there a way (i think using a ramp and sampler info) to get rid of the inner reflections or get rid of the reflection at the back of the object??

Grts!
Attached Thumbnails
Click image for larger version

Name:	Screen shot 2012-04-14 at 19.55.54.png
Views:	537
Size:	143.2 KB
ID:	51051  
karelvdz is offline   Reply With Quote
Old 14-04-2012, 07:42 PM   #2
NextDesign
Technical Director
 
NextDesign's Avatar
 
Join Date: Feb 2004
Posts: 2,988
Thanks: 33
Thanked 532 Times in 471 Posts
Default

Try deleting the back of the sphere.
__________________
Imagination is more important than knowledge.
NextDesign is offline   Reply With Quote
Old 15-04-2012, 05:28 PM   #3
PixalZA
Lifetime Member
 
PixalZA's Avatar
 
Join Date: May 2011
Location: Riyadh, Saudi Arabia
Posts: 525
Thanks: 67
Thanked 90 Times in 77 Posts
Default

Quick question. Do you want any reflections on the inside of the bubbles?
PixalZA is offline   Reply With Quote
Old 15-04-2012, 07:34 PM   #4
karelvdz
Registered User
 
Join Date: Apr 2012
Posts: 6
Thanks: 0
Thanked 3 Times in 3 Posts
Default

Quote:
Originally Posted by PixalZA View Post
Quick question. Do you want any reflections on the inside of the bubbles?
That's the problem i guess. I don't want inside reflections
karelvdz is offline   Reply With Quote
Old 16-04-2012, 08:57 AM   #5
Joey81
Subscriber
 
Joey81's Avatar
 
Join Date: Jan 2010
Location: Budapest, Hungary
Posts: 242
Thanks: 2
Thanked 30 Times in 29 Posts
Default

If you re using a mia material, try to tune the Fresnel reflection under BRDF.
Joey81 is offline   Reply With Quote
Old 16-04-2012, 06:13 PM   #6
PixalZA
Lifetime Member
 
PixalZA's Avatar
 
Join Date: May 2011
Location: Riyadh, Saudi Arabia
Posts: 525
Thanks: 67
Thanked 90 Times in 77 Posts
Default

Hi karelvdz

A possible solution or a starting point for one.

Started with a standard mia_x glass material. Added a samplerinfo node, attached the "flippednormal" attribute to the first term of a condition node and mapped one of the condition node out color channels to the reflectivity parameter. I hardcoded the outcolor on the condition node to 1 if true and 0 if false.

Although the sampler/condition nodes removed the reflection on the insides, the toruses were still being reflected in adjacent bubbles. Had to set a low value for the "Use max distance" parameter under advanced reflectivity to get rid of it. The greyish edge around the bubbles are from the "End Color".

On a side track a question for the gurus on the site. I did a test where I simply turned off the "Visible in reflections" attribute on the torus shapes. The reflections of the toruses were suppressed on the inside of the bubble but they are still reflected on the outside of adjacent bubbles. What gives?
Attached Thumbnails
Click image for larger version

Name:	Reflections_Start.jpeg
Views:	514
Size:	76.8 KB
ID:	51063   Click image for larger version

Name:	Reflections_End.jpeg
Views:	509
Size:	61.6 KB
ID:	51064  
PixalZA is offline   Reply With Quote
Old 19-04-2012, 11:14 AM   #7
karelvdz
Registered User
 
Join Date: Apr 2012
Posts: 6
Thanks: 0
Thanked 3 Times in 3 Posts
Default

Hi PixalZA,

my problem got solved using mia_material_x

I'm now having a render problem (updated both bubble & text material to mia_material_x_passes):

I've made a new renderLayer with 2 contribution maps:
- passBubble
- passText

Now when i watch my passes, i can't see anything in the text Passes.
My bubble pass shows my bubble + the text inside it.

When i move the text out of the bubble it does it correctly.

Can't see to get this fixed.

thx so far!

Quote:
Originally Posted by PixalZA View Post
Hi karelvdz

A possible solution or a starting point for one.

Started with a standard mia_x glass material. Added a samplerinfo node, attached the "flippednormal" attribute to the first term of a condition node and mapped one of the condition node out color channels to the reflectivity parameter. I hardcoded the outcolor on the condition node to 1 if true and 0 if false.

Although the sampler/condition nodes removed the reflection on the insides, the toruses were still being reflected in adjacent bubbles. Had to set a low value for the "Use max distance" parameter under advanced reflectivity to get rid of it. The greyish edge around the bubbles are from the "End Color".

On a side track a question for the gurus on the site. I did a test where I simply turned off the "Visible in reflections" attribute on the torus shapes. The reflections of the toruses were suppressed on the inside of the bubble but they are still reflected on the outside of adjacent bubbles. What gives?
karelvdz is offline   Reply With Quote
New Thread

« Previous Thread | Next Thread »

Thread Tools

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 Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Free Friday Tutorial #5: Mental Ray Approximation Editor Basic David Free Fridays 8 04-08-2012 10:19 PM
What happened to the Mental Ray? SilverFeather Maya Basics & Newbie Lounge 10 06-12-2011 11:13 PM
White background Render problem. Mental Ray Final Gather & HDRI light studio 2.0 goggles Lighting & Rendering 3 03-11-2011 06:01 PM
Mental Ray Issues fairdinkim_m8 Technical Issues 8 28-04-2011 02:19 AM
Mental Ray won't automatically load mechanicarts Mental Ray 2 19-04-2011 11:21 AM

1 Month

$34

Month-to-month billing
$34/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
 
 

3 months

$87

Billing every 3 months
$29/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
Save $5 per month or $15 in total compared to monthly billing with this package.

12 months

$288

Billing every 12 months
$24/month
Unlimited access to all videos
Project files to download
Easy to cancel at anytime
Save $10 per month or $120 in total compared to monthly billing with this package.

Your plan will automatically renew. You can cancel at any time via your PayPal account to avoid being charged again.

You can view the FAQ on our video plans here. You can contact us directly here. By clicking one of the buttons above, you agree to our Terms and Privacy Policy.