matt_vinoir

with exterior scenes. the background image alone won't reflect in glass. I heard about skydomes but don'r know what they are. I put a massive spher over the model and flipped the normals. I had to not use radiosity on the sphere as it crahed but imagine is blechs it out too. It sort of works. THe sky is very dark though. I use self illuminate but i feel i'm going aboutthisin a funny way. Whats the best and simplist way to do this?

trey

i've got the same problem. i'm using the IES system to light my exterior. the image is an interior room looking out.

do i use the skydome as my skylight?

how do i light the skydome to reflect back
at the model?

if the skydome is my skylight, do i need to turn off the skylight in the IES system?

advice is appreciated

STRAT

not using viz 4 for radiosity, i wonder if it's similar to the method used in Cinema4D?

i use a skyobject or skydome with a nice strong sky map on it and make it not visible to the camera. in this state it doesn't render because it's invisible to the camera, but it does still effect the radiosity, so image based lighting from it can be used. i then just use a normal environmental image for the backround which doesn't effect radiosity.

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matt_vinoir

nisus uses viz 4 doesn't he. oi nisus give us a hand mate!

How do you get sky reflections in windows for external scenes nisus?

Ismael

VIZ4 uses the diffuse color for the reflectance of a material. Usually for clear glass the diffuse, ambient, reflect color swatches are set to black. Black is transparent... Adjust the reflect color swatch until you get the right reflection of the environment map.

Chico

nisus

Hi all,

To be honest I'm more a max3.1-man than viz4-oriented, because I could not get exteriors right in viz. Interiors are fine, but exteriors are hell: the sky always seems blown out, my multiple skydomes just don't seem to work. The results are catastrophical and don't seem logically at all...

So my only tip is not to use viz4 for exteriors...

rgds

nisus

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matt_vinoir

oh, well i'm not finding too difficlut to achieve nice exterior results, i just can't get any reflection from the background enirvoment image in my glass thats all. i'm considering vray for my exteriors, is this easier?

Vince Paske

You can try mapping a bitmap to the diffuse channel of your glass to fake the reflections.

Frank

Hi,

You could also try putting the sky map in the envirement(spelling) map slot of the raytrace material your using for the glass.

Spongebob

Matt,

I am in the process of doing a side-job in VIZ 4, and after seeing your post I decided it was time for me to get a skydome nailed down. I have one placed and it seems to work well. It is my first truly sucessful attempt (that wasn't by accident)

The skydome does need to be lit by its own exclusive omni. Simply exclude all other objects from the light source to not invade your scene.

And dont worry about having to turn off radiosity for the dome because it is required. ...unless of course you want the entire scene washed over with blue from the sky. Turn off radiosity for the grass as well or it will do the same.

Let me know if it helps - and if you have another question.

Good luck,
Spongebob
Detroit, MI