Creating Reflections

[Nachi]

Hey Folks,

Fist of all, i'd like to say hi.

Im new around here. Hope this will be nice.

 

I'm trying to create reflections for a glass facade.

The render is of a building i'm compositing onto an image.

I've been trying to use a range of options but nothing is giving me

good results.

I have the image in the max enviroment slot.

I dont want the reflections from the enviroment image so...

Ive used a vray reflection/refraction override with a different map

but then i dont see my backround/enviroment image refracting through the glass.

(which in some areas need to be seen through)

Iv'e then used the refraction override with the original enviroment map but thats giving me some weird effects of double reflections.

( the refraction override map and the reflection override map are reflecting in the glass????)

Ive also udes the vray dome but thats not letting me see through to the Backround/enviroment image.

 

Does anyone have a good workflow for ceating nice reflections in glass that i could

learn.

It would help me a bunch. Thank you.

[Craig Ramsay]

Can you post a render? With regards to your V-ray dome light, make sure it's set to invisible in the light settings, you'll then be able to see your background.

[Nachi]

Hey Craig,

Thx for your reply,

i'm posting a render sketch, as you can see this is the render with double reflections on the facade.[ATTACH=CONFIG]41172[/ATTACH]

[Craig Ramsay]

If I were you I'd comp the background in separately using photoshop rather than rendering it with the model. From what I can remember, having a background image in your refraction override with environment mapping set to screen can cause problems.

[Nachi]

Thx alot dude,

problem with comping in photoshop is that,

let's say i render the image on a black BG and

then save it on as a Targa with an embedded alpha channel ( 32 Bit ).

when i go into Photoshop and apply the Alpha as a mask, it still

leaves me some black pixels in the edges.

In AfterEffects there is an option to tell the software that the Targa is premultiplied

with black and that takes care of the problem, but in Photoshop I dont know

of a good solution.

Do you know of anything?