I´m rendering a car part by part and compositiong them in photoshop. But when I´m applying the alphas they don´t fit correctly.. I have read some about it on the forum and as I have seen there is only one solution, using layer → matte options i PS. But it doesn´t work very well either..
I thought something as important as this would have been fixed ages ago..
Can you post an image of your problem or email it to vlado@chaosgroup.com?
In addition to the matte option in photoshop, make sure that you have rendered your objects against a black background.
I am not quite sure if AA filters can influence this, but it is probably better not to use sharpening antialiasing filters (e.g. catmull-rom or Mitchell-Netravali).
Best regards,
Vlado
I´ll see if I have some spare time over later so that I can send you a render.
I´m rendering with a white background right now. Why should I render with a black background?
I´m using michell right now.
because rendering on non-black backgrounds introduces problems in AA Areas as AA pixels are basically semitransparent thus taking up the backgroundcolor.
Regards,
Thorsten
You can find some discussions and solutions for the same issue in these threads:
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?p=146362&highlight=png+alpha#146362
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?p=35867&highlight=png+alpha#35867
http://www.chaosgroup.com/forum/phpBB2/viewtopic.php?p=144455&highlight=png+alpha#144455
Best regards,
Vlado
I´ll check out the links.
I´m sending you a PSD-file right now where I´m showing the same problem as before, this time with black background.
this is why i usually like to use striaght for my alpha channel in my tgas