what does architectural shader do?

viluvulu

Hey! 

Tried to search but cant find any relevant info about the architectural shader from nvidia mdl examples.

What is it used for?

Fishtales

It helps with indoor lighting.

http://blog.irayrender.com/post/51722647664/the-architectural-and-caustic-samplers

viluvulu

Thanks. But i think that is about the architectural sampler inside your iray settings. 

I cant find anything about the shader.

 

Fishtales

As far as I can see it gives more options for tweaking buildings with sliders for absorption and angle of reflectance to make them look more 'real'. Probably more use to Architects though.

viluvulu

Heh. I'm playing with it because of you!       https://www.daz3d.com/forums/discussion/70054/how-to-light-up-interiors-using-hdri-s

All i get is shiny walls from it. But im no architect so i better stay clear 

 

Fishtales

Ah! Thanks for pointing that out. It should have been Arcitectural SAMPLER not shader. I have corrected it 

Fishtales

Another way to get light into an interior using HDRI is to use a Light Portal.

I think the reason your walls are bright white is because you have the Tone Mapping settings set for low light either that or the light you are using is too bright and you need to drop back on the lumens. If it is an HDRI in the Environment Map then turn down the Map intensity or Environment Intensity.

viluvulu

I have not touched daz since they released iray 

So i have alot to learn (iray). I'm trying to to get a good allround interior lighting setup that i can import to different scenes with minimal work needed. That was easy with uberenvironment and 3delight.

That seems impossible with iray, and it will take weeks before you are ready to render. I want good lighting from every room in the house. Not just each room as a seperate scene.

So far im getting better than nothing results ;) with this house scene. But its still way too dark inside making the models look dull. It looks like a nuke went of outside, the roof is emitting lighting. And i have normal roof lights on.

I use sun-sky only because i think its the most realistic looking.

 

Time for a drink before i shelf daz again lol

Fishtales

Sun and Sky only means you don't get a backdrop from the Environment and any scene lights wont be used. To get scene lights Environment needs to be set for Dome and Scene and to get Sun and Sky leave the Environment Map set at none. If you want an HDRI as a backdrop then load it into the Environment Map slot but you will then lose Sun and Sky but you will get light from the HDRI. If all that makes sense :) Think of the Iray Dome like uberenvironment.

AndyS

viluvulu said:

I use sun-sky only because i think its the most realistic looking.

I do the same - as long as there is no need to see a cloudy sky or neighbored environment looking ou of the window.
Some nice alternatives came with TerraDome 3.

But that's what it is about iRay: It is a photorealistic render engine. The "good old " UE2, especially the simple, fast rendering settings are far away from realistic.
The nature of UE2 is to produce environment light out of the nowhere without any physical source.
The first better approach was setting UE2-IDL. Next better step was the Bounce(GI) mode. But please with "Max. Raytrace Distance" = endless.

OK - if you simply want a nice light distribution in the scene without claiming realsm, UE2 is a good and fast rendering solution.

The attachment shows the iRay setup with sun-sky and some discrete ghostlights placed in the windows.