w.i.p. Day spa reception

[timmatron]

This is only the 3rd interior I've done with Vray - and the last one was about a year ago, so I'm pretty rusty.

This is the beginning of a reception & retail area for a day spa. So far I don't have much info. on the project & this is as far as I've gotten. Notice the lovely, ever popular, ies file from Natty.

One question I have so far is what is causing the red splotches on the glass reflection? I turned off the glass to calc. the irr. map. Then turn on and re-render at the same resolution. The glass mat. is diffuse=black, reflect=67, refract=240, subdiv.=8, no interp., no fresnel.

Is it a material problem, irrad. problem, or other settings?



thanks

[timmatron]

Another thing I noticed... I must be doing something wrong because this glass is blocking so much of the incoming light, even though its a saved irr. map. Notice how much different this one looks with the glass turned off. There is even direct sun coming in from the very top that is cast on the floor by the back wall.

[natty]

Hi ..

yeah ive also noticed with this version that glass seems to block a lot of light, try to increase the refraction depth to see if that helps.

The red Marks in the window could be caused by the Tick box called "Limit search", switch it off and see if that works... Nice Ies by the way.

[timmatron]

Natty - I tried unchecking limit search, but had no effect. I still get the red in the reflections. Any other ideas?

I solved part of the problem with the glass by checking 'affect shadows'. That let the direct light come through. And another part of it was I had the vray light in front of the opening not 'stored w/ irr. map'. So the glass was blocking a lot of the vray light from coming in.

But this is what I think is weird. In the glass material, I put reflect to 0, and refract to 255 to see what would happen. Theoretically, that should make it completely transparent, with no effect on the background. So this image below should look like the image above, where the glass layer was turned off.

Why is the background so much darker, even with a completely transparent material?

[natty]

although you have turned it completey transparent you still have refraction.

[RErender]

You can try using "precalc'd Overlap"

[timmatron]

although you have turned it completey transparent you still have refraction.

Not sure what that means though. Its normal for the background to get screwed up like that?

This is the bitmap I have in the environment slot.

[timmatron]

You can try using "precalc'd Overlap"

In advanced options, right? Thats what it was set at, but didn't make a difference what I switched it to.

I appreciate any suggestion though! Keep 'em coming.

[natty]

so did you increase the amount of refraction Depth ?

[timmatron]

so did you increase the amount of refraction Depth ?

Yea, tried that too - as much as 500 just to make sure, but didn't change anything.

[natty]

Just a thought but the more reflection you have the less light will get in.. i suggest you exclude the glass from the vray light's.

[anders]

about the darkening of the bg, are you using color mapping ?
if yes then that's why!

the exclude bg don't work through glass! (afaik)


/stensgaard

[timmatron]

You guys both helped a lot. I didn't think about excluding the glass from all exterior lights. That helped all light to come through.

Anders hit the nail on the head! The color mapping of the background gets wrecked when there is anything in front of it - even if its completely transparent. He is also right when saying the 'affect background' box doesn't make a damn bit of difference in this case either.

So I doubled the rgb level output of the background map, and it helped a little, but it still looks too dark & drab outside. How does everybody else remedy this and have bright, overexposed exteriors, as a normal interior photograph would? I guess I could make 2 passes - one without glass and one with glass, then play with the 2 in photoshop. But I was hoping for a less 'ghetto' way of doing it.

Also, I don't get the red splotches on the reflections when I use the Lightmap, so I'm hoping that when I increase the IR map settings, this will politely go away.

[natty]

is the glass mat a new one or one that is saved ?
try making a new one ..

[timmatron]

is the glass mat a new one or one that is saved ?
try making a new one ..

Hey not sure what you mean. Just to be sure though I did try making a new mat. and had similar results.