SimplyMaya Forums

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

Home / forum / Lounges / Maya Basics & Newbie Lounge / Bump mapping help
Register FAQ Members List Calendar Mark Forums Read

New Thread
 
Thread Tools
Old 30-09-2007, 05:17 AM   #1
gubar
Registered User
 
Join Date: Mar 2007
Posts: 1,055
Thanks: 2
Thanked 59 Times in 56 Posts
Default Bump mapping help

Hi,

just been experimenting with bump maps before starting for real. On my grey base image in photoshop, if I paint one white stripe and one black, in my renders, the white one appears sunken in, but the black one has no effect at all.

Have I got a setting wrong?

thanks,

gubar.
gubar is offline   Reply With Quote
Old 30-09-2007, 05:23 AM   #2
gster123
Moderator
 
gster123's Avatar
 
Join Date: May 2005
Location: Manchester Uk
Posts: 6,300
Thanks: 1
Thanked 51 Times in 45 Posts
Default

if youve got the grey set to mid greay then you need to change the colour gain to -0.5 in the file node
__________________
"No pressure, no diamonds" Thomas Carlyle
gster123 is offline   Reply With Quote
Old 30-09-2007, 05:32 AM   #3
gubar
Registered User
 
Join Date: Mar 2007
Posts: 1,055
Thanks: 2
Thanked 59 Times in 56 Posts
Default

Hi,

do you mean the alpha gain? I've tried altering it, and the alpha offset values. It makes a difference to how the white is rendered, but the black still has no effect.

cheers,

gubar.
gubar is offline   Reply With Quote
Old 30-09-2007, 05:45 AM   #4
gubar
Registered User
 
Join Date: Mar 2007
Posts: 1,055
Thanks: 2
Thanked 59 Times in 56 Posts
Default

Ok, just tried it with a new scene and it is working now. Don't know why it wasn't in the previous scene.

Another question if I may - even using a fairly high resolution texture (1024 x 1024), after I blur my lines (to fade in and out of the shadow, I'm trying to do some inner chest muscles), the bumpstarts to look pixelated when I render. Are there any ways to avoid this, or are normal maps a better solution? I'm hoping there's a way to sort the bumps, since I've not looked at normal mapping yet.

thanks,

gubar.

Here's an image to show you what I mean:
Attached Thumbnails
Click image for larger version

Name:	cube.jpg
Views:	56
Size:	4.2 KB
ID:	36447  
gubar is offline   Reply With Quote
Old 30-09-2007, 11:01 PM   #5
gubar
Registered User
 
Join Date: Mar 2007
Posts: 1,055
Thanks: 2
Thanked 59 Times in 56 Posts
Default

No one able to advise on this bump mapping issue? Could it be that bumps are only suited to small wrinkles and creases, and not larger bumps?

thanks,

gybar
gubar is offline   Reply With Quote
Old 30-09-2007, 11:14 PM   #6
gster123
Moderator
 
gster123's Avatar
 
Join Date: May 2005
Location: Manchester Uk
Posts: 6,300
Thanks: 1
Thanked 51 Times in 45 Posts
Default

for something like that I would probably use a displacement map. as it looks loke your trying to get a lot out of the bump map.

I only use bumps for small/medium things, wood grain on a table top, brick textures etc etc.

A bump map alters the normal to make it look displaced where a diaplacement map actually creates geometry to give the detial.

You could try saving your map as a 2048 and give that ago to see if its any different.
__________________
"No pressure, no diamonds" Thomas Carlyle
gster123 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 On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Open Challenge -Jerry Can Texturing honestdom Battle Arena 77 03-12-2010 12:20 PM

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.