Non square textures in Unreal 3?

AXiao

Hey guys, I was importing things into the engine today and I come across a problem with non square textures.

so I imported some 256 x 512 maps into the engine. in the generic browser it seems like unreal recognize it as nonsquare texture. you can see the texture on one side and the other side is filled with black. but once i create a material out of that texture, in the material editor it stretches the texture sample horizontally instead of recognizing it as a rectangle texture. any idea how to handle non square textures in unreal 3? thanks!:)

JordanW

Thats working fine, just load up your model that uses the non square texture and you should be ok.

AXiao

Hey Jordan, thanks for replying. lemme illustrate the problem, sorry for the poor description in the question.



i cant find any option in the material editor to prevent texture sample from stretching my texture, even though in generic browser it appears to recognize that it's a non square texture and fills the rest with black.

salman_fas

Just stretch your UV's as with this layout the model is only using half of the texture.

rhoymand

ut3 will recognize it as a non-square texture, but itll always be forced to fit into a square UV. itll align the square with the smallest number (256px in your case) and squash the 512px down to fit. the information is still there, but just squashed. to fix this you stretch your UVs sideways so it takes up the whole square.

AXiao

ugh, i feel so stupid now , thanks guys for the help.

sprunghunt

You can also put in a texCoordinate node in your material and set the U or V amount to 0.5 or something.

AXiao

sprunghunt: texcoordinate tiles both the u and v evenly though, i would love to know how to just tile either U or V axis. teach me, mastah

rhoymand

I thought texcoordinate can tile U and V independently, but it just moves it over. it doesn't stretch them like how axiao would've needed.

JordanW

A texcoord node multiplied by a vector2 tiles, added to a vector2 "moves" it

just think of uv's as numbers
uvs are really a float2 that goes from 0,0 at the top right to 1,1 at the bottom (hint this can be used as a gradient )

AXiao

wow it worked! thanks for the tips jordan, i didnt know multiply can work that way too! :poly136::thumbup:

Jesse Moody

Jordan beat me to this.

sprunghunt

AXiao wrote: »

sprunghunt: texcoordinate tiles both the u and v evenly though, i would love to know how to just tile either U or V axis. teach me, mastah

I just checked and in the UT3 editor it has two variables you can adjust. I'm guessing you're using the gears of war editor?

But there's no reason why you need to use a texcoord node. You can use appendVector to join two constants together and feed that into your UV slot.

Of course you can also use the solution provided by JordanW

EarthQuake

Or you could just fix your uvs. =P