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General Category => General Anim8or Forum => Topic started by: falloffalot on April 01, 2008, 01:58:45 pm

Title: How do I create bump & trans maps?
Post by: falloffalot on April 01, 2008, 01:58:45 pm

Does anyone know of an easy way to create a bump and/or trans map from a picture?
As some bump and trans maps look as though they have just been converted to either greyscale or black and white.
Is this how it's done or am I way off?

Here is a pic of a tree I took today as an example:

(http://i266.photobucket.com/albums/ii276/crash_photos_01/DSCF0203.jpg)

Thanks

Title: Re: How do I create bump & trans maps?
Post by: hihosilver on April 01, 2008, 02:01:18 pm

That is definitely one way to do it.  If you want it more realistic though, it may require you darkening and lightening certain parts.  Converting to grayscale always does a decent job but isn't normally fully realistic.  So to get realistic bumpmaps you'd have to take much mroe time on them and select what you want bumped and what you don't then make them darks and lights.

Title: Re: How do I create bump & trans maps?
Post by: floyd86 on April 01, 2008, 02:08:05 pm

You can also use the same texture you used for you diffuse map as a bump map. No need to make it black and white or greyscale. I never use those and it works out fine for me. For a trans map you should make it black and white or greyscale.

Title: Re: How do I create bump & trans maps?
Post by: falloffalot on April 01, 2008, 02:43:36 pm

Just had a go at using the pic in the diffuse and also in the bump with a bump of 40 see the results below.
This program never fails to amaze me.
The only issue I have is that the very front of the tree seems to be slighty out of focus.  ???
Is this normal or is there a way to adjust it?

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

Title: Re: How do I create bump & trans maps?
Post by: thecolclough on April 01, 2008, 02:51:04 pm

it probably looks blurred because the texture isn't high-res enough.  it works in principle, but i suspect it'll look more in-focus if you have a higher-res photo.

- colclough

Title: Re: How do I create bump & trans maps?
Post by: falloffalot on April 01, 2008, 03:06:50 pm

Of course yeah.........like a fool I've reduced the quality of the pic to post it on here and never copied it.
So i've only got the low res pic left, the res on the original was in 7M(F) as well.

Thanks for the help

Title: Re: How do I create bump & trans maps?
Post by: cooldude234 on April 05, 2010, 03:33:58 am

I really just got bored, and dont know how I came acrosst this topic, but I made own version using the picture you provided falloffalot, I quickly did this within listening to a few songs of Neil Young.
Reminder: It was just pure boredom

Title: Re: How do I create bump & trans maps?
Post by: floyd86 on April 07, 2010, 07:09:57 am

@cooldude234: please do not bump old topics. You can show you work in the finished work and WIP section..

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