how to texture object with multi ID

[anthonymagdelaine]

i usally work with object from max, with multi-Texture ID, like trees with barks and leafs,
is it possible to set it back inside CE?

[MatthiasBuehler1]

Hi,

I'm not perfectly sure what you mean ..

You can bring over textured objects from 3ds Max to CityEngine via .obj ( with .mtl ) and .dae ..

Let me know..

Maybe add a few screenshots !

matt

[anthonymagdelaine]

ok, i mean 1 object (like a tree) with 2 texture (one for bark, one for leafs)
inside max this return a multi-material contening 2 materials,
and the differents polys are identified by material ID (1 or 2).

because i use .obj, i must load .mtl like you mensionned.

first test i seen that the .obj try to load unknown texture, refering them to the C: folder i used inside max. is it possible to modify this line to the CE folders and subfolder?

i didn't find any information about this

[MatthiasBuehler1]

hi !

the best is to edit the .obj's .mtl file.

place all files (.obj, .mtl and textures) in the same CityEngine directory, e.g. :
assets/myTree/

edit the .mtl file's texture path to a just the texture name
e.g.

map_Kd barkTexture.jpg

that way, CE directly uses this relative path and not the full system path (C:/...)

ok?

[anthonymagdelaine]

i understand and tryed this way, but not working, i missed something as you can see on this screen:

[ATTACH=CONFIG]20452[/ATTACH]

[MatthiasBuehler1]

Hi !

Not sure why you have multiple textures .. but per material, you should only have 1 texture reference in the .mtl file ..

After inserting the asset in CGA with i(), if you use texture() to set the texture, you will lose any 'faceMaterials' which were set via the .mtl file.

Also, make sure that you texture only at the 'leafShapes' of your CGA code. If you e.g. insert objects on a surface which already has a texture set, the texture will be inherited on following shapes.

Let me know if this makes sense..

🙂