Very large UV shells. Please help

stephenq80

I have recently come across a problem that I have never encountered before. My UV shells are absolutely massive and do not fit inside the 0 to 1 space. I am trying to model a house to take into Unity. I set my modeling scale to meters and I didn't do anything at all to my UV editor (I assumed everything would sync up...). Also, the house is modular. I am not trying to model it all together and put everything into one UV layout.

 

Below is a screenshot of the house pieces altogether to illustrate the size.

Below is the UV layout for just one of the walls.

Any help in getting this back to size would be very appreciated. I need a good layout to get this into Zbrush and Substance Painter.

 

Thank you very much.

icegodofhungary

Use the scale tool to scale them down. You also might want to re-map the faces so they're the right proportions. The current layout could cause distortions.

SnowInChina

if you need a unique texture on all faces, you will need to scale them down and/or break them up into more textures/materials

if a repeating texture is fine, take a look into "trimsheets" and tileable textures ( https://www.youtube.com/watch?v=uUJShalzWy8 quick google search, didnt check content)

stephenq80

icegodofhungary said:

Use the scale tool to scale them down. You also might want to re-map the faces so they're the right proportions. The current layout could cause distortions.

Thanks for the information. That was one of the things I tried. Just scale it down. But, doing that gives terrible texel density. Until this point I have done work on characters and weapons (all done in centimeters) and for every asset, I've used maps of the size 1024 or 2048 with a texel density of 20. My building assets are in meters. When I went to UV them, I  set my map to 2048 and TD to 20 and it gave me this gigantic map. When I scale down the UVs of my simple rectangular wall to fit within a 4k map, I get a TD of...3. I don't think that is good. If my characters, weapons, and armor are running around with a TD of 20 and the buildings have a TD of 3, wont players be able to tell the difference?

Thanks.

stephenq80

SnowInChina said:

if you need a unique texture on all faces, you will need to scale them down and/or break them up into more textures/materials

if a repeating texture is fine, take a look into "trimsheets" and tileable textures ( https://www.youtube.com/watch?v=uUJShalzWy8 quick google search, didnt check content)

Thanks you. I will take a look into it. Though, is it possible to maintain the same texel density of assets created in centimeters (for example characters) and assets created in meters (buildings)? Scaling the UVs of the buildings give very low TD.

Thank you.

SnowInChina

if you are using trimsheets or tileable textures, it is possible, because your UV layout can be outside of the 0-1 grid.

the textures get repeated outside the grid

Kanni3d

It's impossible for you to meet your texel density requirements with a reasonable sized unique texture, best bet is to look into tileables/trims.

Eric Chadwick

We have great resources on texturing buildings here

http://wiki.polycount.com/wiki/Modular_environments

http://wiki.polycount.com/wiki/MultiTexture#Trim_Sheets

stephenq80

Thanks everyone. It looks like all the stuff I learned regarding making characters and associated props is out the window when it comes to this stuff. I will get to learning about Trim Sheets and tileable textures. Thanks for pointing me in the right direction.