Two Textures to one Asset (Material ID)

HAWK12HT

Hi all, would like to know if it is accepted method in industry or not. Assigning 2 materials (textures) to a asset in environment.
For example i have a wall that i want to apply texture to using two different materials. The reason i want to do this is to have more creative freedom when making modular assets rather than sticking to one texture sheet and make a dense mesh "Texturing wise" .

I hope you all understand .

ZacD

Yeah there's some advantages of using 2 materials on one object, but that does count as 2 draw calls. But if one material is instruction expensive, that is perferable to seperate them.

You can also have 2 textures set up on one material, it just depends on what you are trying to do exactly.

HAWK12HT

aha The last bit sounds interesting

can you tell more about how i can set 2 textures in one material, with their Normal and Spec maps too .

Cheers

ZacD

http://www.chrisalbeluhn.com/UDK_Advanced_Vertex_Painting.html

AlexLeighton

You could also create a mask where white is material 1 and black is material 2 and use that to lerp between two textures, do the same with normal and spec. I do this quite a bit with tiling textures, and then you are able to control both textures individually or even multiply an AO pass over the whole material. Unless you need some vastly different functionality on one part of the mesh, it's probably a lot easier to work with one material ID.

ZacD

Also a varation on Alex's suggestion, http://www.chrisalbeluhn.com/UDK_Asset_Position_Offsets_Texturet_Tutorial.html
There's really dozens of ways to combine textures.

HAWK12HT

Ah Thank you for feedback guys, was a great help .