Unable to import power of 2 texture to UT3

Autocon

Every time I try to import a texture into UT3 that isnt the common 512, 1024, 2048 size I get the error "Can't import non-power of two texture width ( 768 )

I have tried this with a few sizes, all are square textures and checked to make sure there not a pixel off. How would a 768x768 not be considered a power of 2 for Unreal?

Anyone know why this is?

Autocon

ok I was just told 768 is a power of 3. i guess that would explain it

Mark Dygert

http://www.vaughns-1-pagers.com/computer/powers-of-2.htm

renderhjs

1,2,4,8,16,32,64,128,512,1024,2048,4096,... pick one of these. Its because of the way those algorithms work inside the engines/ GFX cards they just can use faster bit operations that way which make out the performance.

Shogun3d

Vig wrote: »

http://www.vaughns-1-pagers.com/computer/powers-of-2.htm

You're so ruthless Vig, lol

Autocon

yeah those are always what I have used but this was a requirement for a project so I had to use it.

was hoping to get an engine render in UT3 as I prefer that over max and marmoset was giving me some funky errors, but max render sufficed.

Ghostscape

Autocon wrote: »

yeah those are always what I have used but this was a requirement for a project so I had to use it.

was hoping to get an engine render in UT3 as I prefer that over max and marmoset was giving me some funky errors, but max render sufficed.

If you have a professor saying to use 768xN maps please slap them for me.

carlo_c

What an odd number to choose lol 768.

Not completely off topic, but are there engines that support non power of 2 maps?

Mark Dygert

Bungie, I think they use whatever size works. But they're really special case.

512 + 256 = 768 not that odd really. I could see how someone might think that's a standard size.

crazyfingers

I believe rage uses a pretty unique system, it actually compiles all textures into 1 sigle "supermap". 1 texture for EVERYTHING. You simply let the engine know how much realestate the uv's should take on that map and it auto places it for you, the spec the normal, everything, using the minimal ammount of space necessary, no wasted channels, etc. Imagine how much texture space you'd save by having every UV on the same layout, no corner would go to waste...

So yeah, the days of fidgeting around with UV's are numbered it would seem. Eh, who am I kidding, there'll always be tweaks to be made