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Does Unity import texture coordinates as UVW (Vector3s) or does it discard the third coord?

Discussion in 'General Graphics' started by JRW_WSP, Mar 3, 2020.

  1. JRW_WSP

    JRW_WSP

    Joined:
    Jun 26, 2017
    Posts:
    37
    Pretty much what the title says. I'm investigating Texture 2D Arrays and it would be very handy for my models (from 3ds Max via FBX import) to retain their W texture coordinate for use as an index value.

    Does this come over intact through Unity import processor or does it discard the W variable and mash it down to a UV Vector2??

    Anyone know?

    Cheers!
     
    JRW_WSP, Mar 3, 2020
    #1

  2. JRW_WSP

    JRW_WSP

    Joined:
    Jun 26, 2017
    Posts:
    37
    Oh well by all means someone correct me if I’m wrong but it looks like the FBX format itself stores UVs as only having 2 coordinates so I guess that’s the end of that plan.
     
    JRW_WSP, Mar 3, 2020
    #2

  3. PacoChan

    PacoChan

    Joined:
    May 28, 2015
    Posts:
    44
    If I wanted to store some extra information, I would probably create another UV channel, or maybe store the data in the vertex colors if they are unused. Would that work for you?
     
    PacoChan, Mar 4, 2020
    #3

  4. JRW_WSP

    JRW_WSP

    Joined:
    Jun 26, 2017
    Posts:
    37
    Yeah that's the conclusion I've come to as well. Which should work fine - I just can't work out if I were to use vertex colors if the shader would end up interpolating and blending my textures or not. Which at the moment I don't want but maybe at some point I will. Anyway I need to do some tests!
     
    JRW_WSP, Mar 4, 2020
    #4