Transparency missing with OBJ-import on 1.0RC3

[Jerry2012]

Hi,

I imported an OBJ-File with transparencies for glass, e.g. windows in a house. In the MTL file, e.g. there are lines like "Kd 0.1882353 0.101960786 0.011764706".
Octane 1.0RC3 on a Geforce GTX660 does not show any transparency. So all windows look like metal boards.

I'm quite new to the topic and to octane and looked around a little bit but found only a thread a year ago:
http://render.otoy.com/forum/viewtopic.php?t=10636

Do I something wrong?
How to make glass transparent?

Best regards,
Jerry

[kavorka]

you need to set it up in Octane, not your modeling package (I guess some exporters will do it, but I woudn't trust it). Also, it might just be your render kernel, if you

what type of material are you using?
try setting your render kernel to Path tracing or PMC.

Overall, best to set up everything in Octane.

[Jerry2012]

thanks for your quick answer!
I didn't get it completely.

The switch of the kernel is irrelevant, on all kernels there is no opacity.

In the MTL-File, the object looks like this:
newmtl Tour_Fenetre_344
illum 2
Ka 0.1882353 0.101960786 0.011764706
Kd 0.1882353 0.101960786 0.011764706
Ks 0.46875 0.46875 0.46875
Ns 60.0

And in octane, if I click on the object, opacity/floattexture, it is set to 1.000.
If I reduce this value, the window is getting translucent and everything is fine.

Anyway, it is pretty annoying to do this everytime I import an OBJ-File. I can not understand why the values from the MTL are not used? Is it a bug or did I understand something wrong?

Thanks, Jerry

[roeland]

It's a bug, the d value in MTL is not read correctly. We can fix this in a future release. map_d works, but requires an image.

--
Roeland

[Jerry2012]

ok, so then I will wait for a bugfix. Approximately, I am not the only one who uses glass objects in an OBJ-file.
Can I find release notes somewhere to see if the problem is fixed in a future version?

Thanks for the quick answer!

best regards,

jerry

[Jerry2012]

ohhhhh... in final octane 1.0 the bug is still not fixed.
Any perspective at what date this will be ready?

Anyway, congrats for the 1.0 release!

Jerry

[roeland]

Most of the development was already going into new features that will be introduced in a version of Octane after 1.0. This transparency bug will probably be fixed in the next release.

--
Roeland

[Jerry2012]

ok, thanks a lot for the quick answer.
I'm happily looking forward for that.

Best regards, Jerry