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Poser - OFFICIAL F.A.Q (Last Updated: 2025 Jan 24 4:20 pm)

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Subject: Regarding Converting a bum to a jpg.

leather-guy opened this issue on Jun 30, 2004 ยท 5 posts
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leather-guy ( ) posted Wed, 30 June 2004 at 10:13 PM ยท edited Mon, 29 July 2024 at 8:57 PM

re: Converting a bum to a jpg. Has anyone actually worked out what algorythm Poser uses to generate the bum?

ynsaen ( ) posted Thu, 01 July 2004 at 1:10 AM

It strips the blue channel, offsets the red and green channels, and then changes it to a bmp format, then saves the resulting file with the bum extension. I don't think it's an algorithm so much as it's more or less a script.

thou and I, my friend, can, in the most flunkey world, make, each of us, one non-flunkey, one hero, if we like: that will be two heroes to begin with. (Carlyle)

elizabyte ( ) posted Thu, 01 July 2004 at 1:18 AM

Attached Link: http://www.morphography.uk.vu/bumpmaps.html

Yes. (See attached link.) It's not really reversable, though. What you can do, though, is change the extension from .bum to .bmp, open it in Photoshop (or whatever you use) and make it a greyscale image and tweak it. Sometimes this works very well, sometimes it's less than optimal. bonni

"When a man gives his opinion, he's a man. When a woman gives her opinion, she's a bitch." - Bette Davis

Phantast ( ) posted Thu, 01 July 2004 at 4:57 AM

The moral to merchants is always supply the .jpg as well as the .bum file. Many are good at doing this.

FyreSpiryt ( ) posted Thu, 01 July 2004 at 6:19 AM

It is SOMEWHAT reversible, but with losses. In freestuff, for PC, search for Anthony Appleyard's Imagedit program, which will un-bumpmap bums. For Mac, the program SpeedBump, also in freestuff here, is supposed to do it. (For the longest time, Mac's had a way to unbump and PC didn't. Mac guys, enjoy that. ;) )

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