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xeno
04-20-2003, 01:30 PM
Hi people! Once again im in trouble! Heres the problem..I have this scene, camera tracked, and what i want to do now is to have something flying through it, with a matrix style wave behind it. What ive done so far is i made a sphere, cut it in half and placed a transparant material on it, with refraction upped quite a bit..but now when i render it, my background doesnt "refract". I suppose that this probrably has a very logic explanation, but im a bit stuck on how to do this now..becoz i would really very much like to see the background be "refracted"' .

Thanx loads in advance!
Halogen
04-20-2003, 03:04 PM
with the material box, in the transparency tab theres a little section in the top right with refraction. Have you tried to play with n? That should give you different refraction effects. Sorry my knowledge of cinema 4d is limited...
Srek
04-20-2003, 03:08 PM
Hi,
is your cut sphere closed or open? If it's open refraction will have a hard time to calculate correctly. Try closing the half sphere to correct this.
Hope this helps
Srek

PS Usualy such an effect is made in Post not during rendering
xeno
04-20-2003, 03:08 PM
hey thats cool, any help is great! But yea, ive already upped the values to 3 and still nothing...The background image/movie still not refracting im afraid

ediy, havent tried it srek, gonna try it now! tnx!
xeno
04-20-2003, 03:15 PM
closing the sphere dint work im afraid..but is it even possible to make the bakcground image (in this case the movie) look refracted? (i truly hope it is tho!)

The thing is, when i just use a plan and place the movie on it, then then the refraction works, but not when the image is used as a background
Srek
04-20-2003, 03:23 PM
Hi,
you were right about the background object. It can't be used for refraction because it has no defined distance. Try using a plane instead.
Regards
Srek
xeno
04-20-2003, 03:30 PM
sadly that sounds really logical :( but i have a question then, do u have any suggestions on how i could still achieve the refraction in a camera tracked movie? The problem is, if i use a plane, my tracking coordinates will be completely of...anyway, tnx for the advices!
Srek
04-20-2003, 03:33 PM
Try substituting the background with a realy big plane far away from the camera and give it a "Look at Camera" Expression. Maybe this will work.
Srek
xeno
04-20-2003, 03:42 PM
im afraid it didnt work, tnx again tho, im just gonna forget about this one for now :)
AdamT
04-20-2003, 04:33 PM
Maybe render a transparency pass and add some kind of distortion effect in AE?
LucentDreams
04-20-2003, 09:37 PM
did you apply frontal mapping for the movie texture on the big plane?
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