window lighting

[budd]

Morning all, just a quick question, I'm messing about with lighting a room - as in Nattys tut (cheers Natty!) and I was wandering how you would go about making the sides of the windows render out sheer white - is it easier to just exclude it from the light and set up another one, or is there a magic button!?!

[natty]

hi Budd

what do you mean by Sheer white ?
the sides of the walls ?

[budd]

cheers for the quick reply! I'd post an image but I'm at work (on a day like this! ), I'll try to explain ... if you have a wall with a window cut into it, and a vray light is slightly behind it, the sides of the inner walls where the window is cut into it, (where the window cill would sit if you know what I mean!) renders out solid white, so if you had a colour there or a texture it doesn't show - can this be solved by turning up the bounce multiplier and turning down the light, or should I just exclude the window wall from the vray light and light it with another light and try to match it? if you want I can email you an image of what I mean if its still as clear as mud!

[natty]

i think its all to do with your light set-up and your colour mapping.
you can email me the scene if you like.

[budd]

will do!

[dusan]

I think people generaly have this problem, area light outside the window usually burns out the window wall.

[reza]

try this.

Try having the vray light inside the room flush with the inside wall and add light just to illuminate the opening....usually a direct light..

[budd]

Cheers Guys Just thought I'd post the results of fun with lighting! - It was only a lunch time project to play about with, and after some guidance from Natty heres what I came up with... its a little dark , and a little basic looking but something to work on (maybe in time for xmas!!!)

[axesaxes]

Devide your windows in two materials with the same material and use an material vraymaterialwrapper for one of the materials to lower your GI.

[natty]

looking good Budd
@axesaxes.. i think he has already achieved what he wanted to do

[jedisalf]

any other tip on how to "lower" the burn out look of the windows closer to the Vray light?, besides what axesaxe suggested?

Im having that problem also, i have a Vray light outside the window, the same size oas the window frame, to lit up the interior, when my view is internal, i dont have so much problems, since the outside sides of the window frames are out of view, but im making an exterior view of the room, like if the camera is positioned next to the vray light, looking inside the room, in this case i do see the exterior sides of the window frame, an they are burnt out.

[trixian]

any other tip on how to "lower" the burn out look of the windows closer to the Vray light?, besides what axesaxe suggested?

Im having that problem also, i have a Vray light outside the window, the same size oas the window frame, to lit up the interior, when my view is internal, i dont have so much problems, since the outside sides of the window frames are out of view, but im making an exterior view of the room, like if the camera is positioned next to the vray light, looking inside the room, in this case i do see the exterior sides of the window frame, an they are burnt out.

For exteriors, either remove the vray light you had at the window, as you might not need it, or if you need to see the interior from outside, just move the vray sky light portal to the inside of the window (just past the inner wall).

[dusan]

And where do you people put your lights? Two material technique seems logical, but i have a scene, with both interior and exterior in it, a room with a balcony seen through windows. The problem is those windows are all the way down to the floor, so if i put a light the same size as the windows, the transition can be seen because there is a huge contrast on the floor between the exterior and the interior.
And what to do if your window or opening is not rectangular in shape?

[kedojo]

Budd - whatever your initial problem was, it looks like you fixed it in the posted rendering. What was your solution? I'm having the same problem with blown out window frames / sills...I'm also a little confused by the color mapping settings.

[budd]

hello, the basic, basic solution was to whack a direct light going through the window,with no decay, and then have a vray light just in front of the window (Inside the room) with a lowish setting, to add a little more light