Yet another transparency problem.

[dyvach]

Hi guys,

been doing first early geometry test for msTS port of Acela passenger cars, when ran into strange problem. See yourself.

watch the seats in the coach:

http://forums.flightsim.com/dcforum/User_files/3d022f6434419e2d.jpg

now you see it...

http://forums.flightsim.com/dcforum/User_files/3d022fb935ddb759.jpg

still can see it...

http://forums.flightsim.com/dcforum/User_files/3d02300237a120e5.jpg

and now you don't. :o

as far as i can tell, msTS stops rendering seats surface when the camera is looking toward the Y+ edge of the coach. As soon as it starts looking at Y- half, the seats are back.

The surface is alpha-mapped to get more accurate shape, so are the windows (both outside and inside) I've tried different ways of sorting with various priorities, but this doesn't seem to change anything.

I can fix it by simply disabling alpha mapping for the seats, and the visual difference isn't that big... just curious if anyone knows what may cause that.

[FozzyBear]

LAST EDITED ON Jun-12-02 AT 10:36AM (EDT)[p]>I can fix it by simply
>disabling alpha mapping for the
>seats, and the visual difference
>isn't that big... just curious
>if anyone knows what may
>cause that.

Yes.... If you use Alpha mapping it must be transparent NOT translucent on interior objects....

The exterior windows can be translucent and have a grey level in the alpha chanel. But you MUST use a transparent Alpha Mapping on anything that is internal. Otherwise you get this effect.

Best Regards,
Julian (Fozzy The Bear)

[dyvach]

Thanks... i gave it a quick try (set the material for seats to Transparent, and re-exported... tried with old 32-bit image map and new version with just 1-bit alpha channel) but it didn't change a thing. :( I'll try again later if i find some free time...