Material preview scene suggestion

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galinette
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Material preview scene suggestion

Post by galinette » Thu Oct 25, 2012 11:35 pm

Dear all,

It seems that the grid material of the preview scene has 100% albedo between the lines, which is against every recommendation for diffuse materials! This makes white materials (such as 85 albedo) look darker in comparison and probably cause mis-adjustment of the material properties when adjusted in respect to the preview scene.

Correction needed!

I had to set it to 80% (via the B parameter of the albedo texture) for the styrofoam to look good

Also, it would be nice to have a perfect neutral color rendering in this scene. Setting both emitters to D65 spectrum, and setting white balance to D65, would ensure it together with Reinhardt or Linear tonemap.

Etienne
Last edited by galinette on Thu Oct 25, 2012 11:39 pm, edited 1 time in total.
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galinette
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Re: Material preview scene suggestion

Post by galinette » Thu Oct 25, 2012 11:46 pm

Actually, setting the ground and wall material to 50% gray would be even better than white, to feel the real albedo of materials. White materials look not so good.
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OnoSendai
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Re: Material preview scene suggestion

Post by OnoSendai » Fri Oct 26, 2012 12:04 am

two good points, thanks Etienne.
Changing the mat preview scene really requires re-rendering all materials, so it's quite a big job tho :)
will definitely do tho.

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CTZn
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Re: Material preview scene suggestion

Post by CTZn » Fri Oct 26, 2012 5:27 am

galinette wrote:The scene definitely needs some real corresponding emitter/WB definition.. This way you will have pure grays (ie R=G=B) and any tint complaint will be due to monitors only...
+1

I think that rendering all materials again is of a second priority against allowing color neutral preview renders ?
obsolete asset

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Pibuz
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Re: Material preview scene suggestion

Post by Pibuz » Sat Oct 27, 2012 5:04 am

CTZn wrote: I think that rendering all materials again is of a second priority against allowing color neutral preview renders ?
Definitely. +1 to the request.

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dag
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Re: Material preview scene suggestion

Post by dag » Sat Oct 27, 2012 11:11 pm

I started a completely fresh new preview scene, but there didn't seem to be much interest in it...... :|
Attachments
1.jpg
2.jpg
3.jpg
4.jpg
5.jpg
6.jpg

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PureSpider
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Re: Material preview scene suggestion

Post by PureSpider » Sun Oct 28, 2012 12:03 am

That scene is AMAZING!!
May I have the scene file please?

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Pibuz
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Re: Material preview scene suggestion

Post by Pibuz » Sun Oct 28, 2012 12:51 am

I think they're really classy instead!
I wonder if Whaat can integrate them in one of the less used mat preview scene for SkIndigo.

..may I ask if they can be produced in meters? The current preview scene is quite small (in cm, I think), and in my experience it is not useful for most of the architectural materials I make.

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dag
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Re: Material preview scene suggestion

Post by dag » Sun Oct 28, 2012 1:50 am

It's not really perfectionized yet, and of course you can have it in meters if you want.
I'm wondering though what to do about subdivisioning for displacement.

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Pibuz
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Re: Material preview scene suggestion

Post by Pibuz » Sun Oct 28, 2012 2:10 am

That is one of the problems indeed.

Displacement is really hard to tell from the mat preview if that's in cm, because generally architectural models are in meters. So you don't actually have any "real scale behaviour" from the mat preview at the moment. It's all trial and error. We can do it, but that is a little annoying, that is all.

Also, simply resizing the mat scene wouldn't be the best choice, because diffuse maps would look too small to understand the material behaviour. You need to find a good-looking scale for the textures too 8)

So in general, there would be some more work for you, and I'm a little shy to ask because I know it can be bothering. So if you plan it to be done, please take your time, there's absolutely no hurry for this! Thank you a lot!

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Polinalkrimizei
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Re: Material preview scene suggestion

Post by Polinalkrimizei » Sun Oct 28, 2012 6:42 am

It's somehow more simple and elegant than the default one. Nice work :)

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Re: Material preview scene suggestion

Post by OnoSendai » Thu Nov 01, 2012 6:53 am

Hi All,
Here is the material preview scene with the changes suggested by Etienne:
* Two emitters are now using D65 spectrum
* Removed env map
* Set whitepoint to D65
* Background texture 'b' set to 0.5 (was 1)
* Tonemapping changed to linear.
Attachments
test2.jpg
updated with linear.jpg

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Re: Material preview scene suggestion

Post by OnoSendai » Thu Nov 01, 2012 6:57 am

dag: Your preview scene looks really good, nice one.

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galinette
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Re: Material preview scene suggestion

Post by galinette » Thu Nov 01, 2012 7:06 am

OnoSendai wrote:Hi All,
Here is the material preview scene with the changes suggested by Etienne:
* Two emitters are now using D65 spectrum
* Removed env map
* Set whitepoint to D65
* Background texture 'b' set to 0.5 (was 1)
* Tonemapping changed to linear.
Yes! Pure grays validated by photoshop...
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OnoSendai
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Re: Material preview scene suggestion

Post by OnoSendai » Thu Nov 01, 2012 7:12 am

galinette wrote: Yes! Pure grays validated by photoshop...
Yeah. Looks kinda bad (reddish) on my monitor, but I guess that's just the monitor's fault.

By the way, do you know what the albedo is for e.g. white card that might be used for a studio setup like this? I think it may be more than 0.5.

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