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General Category => General Anim8or Forum => Topic started by: falloffalot on March 23, 2008, 11:53:58 am

Title: Bump Maps?
Post by: falloffalot on March 23, 2008, 11:53:58 am

I think I've got this right, is a bump map a way of adding a bumpy texture to an object without messing about with the models faces?
If not...well, I'm an idiot.......but......
If so could someone give me an idiots guide to how its done please?

Thanks

Title: Re: Bump Maps?
Post by: lynn22 on March 23, 2008, 01:11:43 pm

You are right.
Example, if you have a brick wall (wall covered with a pic of bricks) if you then use that same picture and turn it into black and white where the mortar is black and the bricks are white, use it as a bump map and your brick wall will show grooves where the mortar is.

Title: Re: Bump Maps?
Post by: falloffalot on March 23, 2008, 01:37:19 pm

Cool I'll have a go in a min.
Thanks lynn22

Title: Re: Bump Maps?
Post by: falloffalot on March 23, 2008, 02:21:56 pm

Awesome:

(http://i266.photobucket.com/albums/ii276/crash_photos_01/Bump_Map_Test.jpg)

Had a little trouble at first as I didn't realise the bump doesn't take effect until it's rendered.

Thanks for the help.

Title: Re: Bump Maps?
Post by: lynn22 on March 23, 2008, 05:44:52 pm

Sorry about that, I should have mentioned the render, I forgot   :)

Glad you found it, your image looks great.

Title: Re: Bump Maps?
Post by: falloffalot on March 23, 2008, 07:14:17 pm

Am I right in thinking if the two colours that make the bump possible (black and white),
would different shades of grey make any difference?
I mean: insted of just full bump (black) and no bump (white) would grey make a medium bump?

Title: Re: Bump Maps?
Post by: 3D Joe Wiltshire on March 23, 2008, 07:17:15 pm

if you thought that, you'd be right, yes, the colours affect the bumpy-ness of it, and if you want a more obvious bump, the bumpmap texture in the material is only at 30%, bump it up to 100 to make the bump more obvious

Title: Re: Bump Maps?
Post by: hihosilver on March 23, 2008, 08:14:36 pm

Yes, inbetween shades of gray make smaller bumps.  It's the same with transparency maps and specular maps.

Title: Re: Bump Maps?
Post by: Tanzim on March 23, 2008, 08:42:11 pm

Quote from: falloffalot on March 23, 2008, 02:21:56 pm

Had a little trouble at first as I didn't realise the bump doesn't take effect until it's rendered.

Actually if you go to view->preferences and tick the Use Shaders box you'll be able to see  the bumpmap in real time

Title: Re: Bump Maps?
Post by: lynn22 on March 24, 2008, 04:03:12 am

Quote from: Tanzim on March 23, 2008, 08:42:11 pm

Actually if you go to view->preferences and tick the Use Shaders box you'll be able to see  the bumpmap in real time

"Use Shaders" is grayed out in my preferences, any obvious reason why ?

Title: Re: Bump Maps?
Post by: falloffalot on March 24, 2008, 04:47:37 am

Yeah, mine is too?

Title: Re: Bump Maps?
Post by: Tanzim on March 24, 2008, 06:49:50 am

do you have a graphics card (non-integrated) or their drivers installed?
i have a 7300GT with forceware 169.25

Title: Re: Bump Maps?
Post by: falloffalot on March 24, 2008, 11:48:58 am

I'm using my laptop at the min as my PC has gone strange and I don't think this thing has anything inside it never mind a graphics card. Lol

Title: Re: Bump Maps?
Post by: lynn22 on March 24, 2008, 01:29:48 pm

I don't have a graphics card, just a plain PC, that explains it  :)

Title: Re: Bump Maps?
Post by: CobraSpectre on March 24, 2008, 01:47:44 pm

To get the Shaders options you need to have an OpenGL 2.0 compatible card and new enough drivers. OpenGL compatibility is not labeled, so look for DirectX 9 compatibility.

The lowest Nvidia is the FX 5200, and I'm not sure about ATI.

Title: Re: Bump Maps?
Post by: falloffalot on March 25, 2008, 01:37:40 pm

I have been searching the web for help with textures and found this site www.arroway.de/en/index.html.
The quality is fantastic.
There doesn't seem to be a useful link thread on this forum (that I can find)
I know google is everyones friend but it may be a good idea to start one up.

Title: Re: Bump Maps?
Post by: floyd86 on March 25, 2008, 02:49:33 pm

Are you looking for textures? Because I have a great site for realistic textures and pictures:
http://cgtextures.com/ It has a 30MB upload limit a day but that equals like 30 textures a day so that should be enough.