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digitalimagery
09-30-2013, 03:43 PM
I'm using a reflective panel to get a highlight on some text which sits on a reflective plane (seamless). This is still in progress but I'm seeing a challenge popping up and am not sure what the process is to keep the reflection on the text but not reflect on the seamless background. I want to retain the reflectivity on the seamless. Can this be done without multiple passes and compositing?

Image will explain.

Thanks
DI

vector
09-30-2013, 09:51 PM
I think there is no way but compositing

Surrealist.
09-30-2013, 10:53 PM
Based on what it looks like you are trying to accomplish here, it might be better (or at least one simple option of a few) to use a spherical map which can be also animated. It is a quick and dirty way to do highlights on text.

In the Surface Editor go to Environment and select Ray Tracing and Spherical Map. Then adjust the image seam angle. (which can also be animated)

Here is a sample of the effect the the reflection image used to get it. Note that you can also blur the image edges as well as add reflection blurring.

Attached also is the zip with the LW files.

Sensei
09-30-2013, 11:39 PM
Do you saw how to control reflections in mine video tutorials?
http://www.youtube.com/watch?v=WjvUxRnNcak
http://www.youtube.com/watch?v=nP425jM1oGM

I am showing how to implement hand made Reflection Recursion limit cutting off rays when we need, without touching global one (so per-surface)..

jeric_synergy
09-30-2013, 11:40 PM
Yup: two passes.

geo_n
10-01-2013, 01:46 AM
gerardo or cageman has something about this I forgot which thread. have to check out sensei's video.
Wouldn't it be great and fast if under object properties there's a checkmark for visible to reflection/refraction? :D

XswampyX
10-01-2013, 03:08 AM
It's not that difficult.... You need spot info node (that has been removed, huh. Why?) and just change the surface of the card to transparent when you are drawing it's reflection on the floor.

http://i465.photobucket.com/albums/rr16/xXswampyXx/Ref_Sel_zpse38f12df.jpg (http://s465.photobucket.com/user/xXswampyXx/media/Ref_Sel_zpse38f12df.jpg.html)

Extended spot info node from here :- http://www.db-w.com/home

Sample file here :-

Cheers!

BeeVee
10-01-2013, 08:08 AM
Do you not have what you need in the Input node?

B

XswampyX
10-01-2013, 08:15 AM
No, erm i mean Yes. erm... :)

It's fine. The integer node is the node you change to get the ray source ID of the floor. I should have renamed it to Raysource ID exclude.

digitalimagery
10-01-2013, 08:49 AM
Yes it would. In fact I was hoping to see something like that in a response and thought I'd missed it along the way. It seems so logical (and probably as easy to implement as an object list like which geometry lights hit/don't hit. I'm a bit surprised this isn't an option (yet?).

Thanks.
DI


gerardo or cageman has something about this I forgot which thread. have to check out sensei's video.
Wouldn't it be great and fast if under object properties there's a checkmark for visible to reflection/refraction? :D

digitalimagery
10-01-2013, 09:02 AM
Sensei,

I truly appreciate the response (as I do for all those who chimed in). I watched about half of your video and am thoroughly impressed by your understanding and command of the node editor (I'm very inexperienced with it). While watching it, I couldn't help but think to my self, "all this to make a reflection not hit a surface?" I can see how in more complex scenes this might be the only option and I'll remember this for those times but seriously, this is a feature that needs implementing. There should simply be a list of geometry with the option to not reflect onto items checked, like lights. Simple, fast, easy.

Thank you
DI

digitalimagery
10-01-2013, 09:16 AM
Surrealist,

Thanks for the response. I'm aware of the spherical environmental reflection and this may be an option (with a hard edged environmental map on the leading edge). I'm going for that hard leading edge reflection that seems so popular in text animations (and TV's, iPads, iPhones etc.) these days (as seen in this previous post: http://forums.newtek.com/showthread.php?131413-Logo-Reflections&highlight=digitalimagery%2C+reflection).

Now that I understand how to get the look I'm after I need to keep it only on the geometry I want reflecting it. I'll experiment with this technique. If anything I'm learning different ways of doing things.

Thanks.
DI

digitalimagery
10-01-2013, 09:46 AM
swampy,

I downloaded/installed the db&w plugins but when I opened your attached file I got a missing "node handler" warning. Once in the file only two nodes were open in the window. what am i missing?

thanks
DI

digitalimagery
10-01-2013, 09:50 AM
If you could send me or post a clearer image I can probably just set this up on my own file. I just can't read what nodes are being used in your attached image.

Thanks
DI


It's not that difficult.... You need spot info node (that has been removed, huh. Why?) and just change the surface of the card to transparent when you are drawing it's reflection on the floor.

http://i465.photobucket.com/albums/rr16/xXswampyXx/Ref_Sel_zpse38f12df.jpg (http://s465.photobucket.com/user/xXswampyXx/media/Ref_Sel_zpse38f12df.jpg.html)

Extended spot info node from here :- http://www.db-w.com/home

Sample file here :-

Cheers!

XswampyX
10-01-2013, 10:15 AM
Here you go....

117416

Just click on it.

Surrealist.
10-01-2013, 11:32 AM
@ DI,

I kinda figured you could do something like this with Nodes. Which I think looks better.

And yeah a simple on off switch would be nice. But it is worth it to expand your knowledge of Nodes because you will find it far more flexible to do what you want and find other uses for the future. It is time well spent.

My idea was just quick and dirty old school, simple, gets you there in a pinch if you need it. I always like an out if things start getting too complex and start to break or take too much time.

And by the way it does work with hard edges as well. Didn't know that was what you wanted.

digitalimagery
10-01-2013, 11:42 AM
@ DI,

I kinda figured you could do something like this with Nodes. Which I think looks better.

And yeah a simple on off switch would be nice. But it is worth it to expand your knowledge of Nodes because you will find it far more flexible to do what you want and find other uses for the future. It is time well spent.

My idea was just quick and dirty old school, simple, gets you there in a pinch if you need it. I always like an out if things start getting too complex and start to break or take too much time.

And by the way it does work with hard edges as well. Didn't know that was what you wanted.

Thanks Richard,

I decided to make my life easier (and meet the deadline) by just making the background plane non reflective. By just doing that the setup works as is. Thanks for the effort and I will experiment with that technique in future works - it's something I do a lot of.

Here's what I'm ending up with (attached).

DI

Surrealist.
10-01-2013, 12:56 PM
Yeah gotta do what ya gotta do. Always nice to have options.

Looking good!

digitalimagery
10-01-2013, 01:05 PM
Yeah gotta do what ya gotta do. Always nice to have options.

Looking good!

Thanks

DI