How to simulate a sun lit interior with the SU exporter?

kwistenbiebel · Post by **kwistenbiebel** » Tue Feb 06, 2007 4:10 am

manitwo wrote:turn of bidir in the infile if you wan't to render glas+sunlight.

bidirectional path tracing was set to 'off'.

manitwo · Post by **manitwo** » Tue Feb 06, 2007 4:15 am

kwistenbiebel wrote:bidirectional path tracing was set to 'off'.

hmm ... what version of indigo are you rendering with?

kwistenbiebel · Post by **kwistenbiebel** » Tue Feb 06, 2007 4:16 am

The Sketchup exporter currently works only with 0.6.

manitwo · Post by **manitwo** » Tue Feb 06, 2007 4:40 am

strange - with bidir off it should work

http://www2.indigorenderer.com/joomla/f ... .php?t=993

Whaat · Post by **Whaat** » Tue Feb 06, 2007 4:40 am

As an alternative to hiding the glass material, you could also set the IOR to 1.0. This should let the sunlight through. However, you will want to change it back to 1.5 when using interior lighting. I think this issue is discussed somewhere on the Indigo forums but I couldn't find it. It is not a bug in the exporter.

Whaat

kepler · Post by **kepler** » Tue Feb 06, 2007 4:45 am

It is surely not a bug in the exporter because I've rendered a very similar scene yesterday (sorry, I've deleted the file

) and the shadows were good with the windows mounted. You should care that the transparency of the material is zero, that (to be secure) the colour is near white. There's a grey glass preset in the Sketchup library, it's good but it has the transparency > 0.

This is all what I can tell you (for my limited experience).

kwistenbiebel · Post by **kwistenbiebel** » Tue Feb 06, 2007 4:56 am

Thanks Kepler and Whaat,

Opacity was set to 12 in Sketchup.
I will try to set it to 0.

Concerning IOR 1,0 instead of 1.5:
If i would model the outside environment, will i still be able to see reflections on the glass ?

kwistenbiebel · Post by **kwistenbiebel** » Tue Feb 06, 2007 10:52 am

Here is the resulting image with sun on, glass IOR 1.0 and opacity 0:

kepler · Post by **kepler** » Wed Feb 07, 2007 4:43 am

kwistenbiebel wrote:Here is the resulting image with sun on, glass IOR 1.0 and opacity 0

I'm sure that the problem was opacity, so you could set glass IOR 1.5 (there's a glass preset in the export script).

Nice render.

CTZn · Post by **CTZn** » Wed Feb 07, 2007 7:47 am

Nice render.

Yes. Pretty much what was expected

soxofaan · Post by **soxofaan** » Wed Feb 07, 2007 1:04 pm

kwistenbiebel wrote:Does this mean that inndigo has a 'sun through glass issue'?

I once had the same problem and did some experiments (indigo 0.6):
see http://www2.indigorenderer.com/joomla/f ... .php?t=993

groeten uit Gent
(EN: greetings from Ghent, Belgium)

kwistenbiebel · Post by **kwistenbiebel** » Thu Feb 08, 2007 1:24 am

Thanks Soxofaan for pointing that out.
ps: I am living in Herenthout

A_Minima · Post by **A_Minima** » Mon Feb 26, 2007 11:33 am

Hi, Kwisten
I probably will tell something stupid but I tell it :
we (SU users) have often had problems with some renderers (unbiased renderers for example) with glass material when we didn't give a thickness to our glass planes : the renderer could identify the entry point of the light into the material but not the outpout and then the renders was not able to render correctly glass objects. Is it necessary to give a thickness to the glas with Indigo (like with Maxwell) or it doesn't change anything ?

kwistenbiebel · Post by **kwistenbiebel** » Mon Feb 26, 2007 7:13 pm

Hi Minima,
Good to see you here.
For sun lit interiors, I Personnaly use a single plane glass...
That works well.
I haven't tried double planes yet.

regards,
kwistenbiebel

Kram1032 · Post by **Kram1032** » Tue Feb 27, 2007 3:40 am

For sunlight, E is the wrong white balance...
Maybe, it should be D75...?

How to simulate a sun lit interior with the SU exporter?

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