A couple of renderings

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Thammuz
Posts: 22
Joined: Mon Nov 28, 2011 8:36 am
Location: Stockholm

A couple of renderings

Postby Thammuz » Tue Dec 20, 2011 10:34 am

Not too much going on in the visuals section, so I thought I'd some images I've rendered recently, with my renderer.
Simple unidirectional path tracing for the trumpet and the earphones, and pathtracing with mlt for the robot girl.
I want to be clear though, that the model's weren't done by me. I got them from blendswap (a really good
source for models). For the robot scene, and the trumpet scene, I did model the lighting/studio setup though.

Model Credits:
Robot girl model: http://www.blendswap.com/3D-models/characters/neeloo-robot-women/
By: Yoji - http://www.blendswap.com/3D-models/author/yoji/

Trumpet model: http://www.blendswap.com/3D-models/musical-instruments/trompeta/
By: hernandoramos - http://www.blendswap.com/3D-models/author/hernandoramos/

Earphones model: http://www.blendswap.com/3D-models/electronics/earphone-luxrender/
By: beruang - http://www.blendswap.com/3D-models/author/beruang/

The images:
Attachments
earphones.png
Earphones
earphones.png (372.13 KiB) Viewed 5803 times
trumpet.png
Trumpet
trumpet.png (815.56 KiB) Viewed 5803 times
robogirl.png
Robot girl
robogirl.png (630.52 KiB) Viewed 5803 times

fursund
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Re: A couple of renderings

Postby fursund » Tue Dec 20, 2011 3:41 pm

Good job, looks really nice. What is your rendertime like?

ingenious
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Re: A couple of renderings

Postby ingenious » Tue Dec 20, 2011 4:35 pm

Nice materials and lighting. What are the materials on the trumpet and the white plastic on the robot?
Image Click here. You'll thank me later.

Thammuz
Posts: 22
Joined: Mon Nov 28, 2011 8:36 am
Location: Stockholm

Re: A couple of renderings

Postby Thammuz » Tue Dec 20, 2011 6:49 pm

Thanks & thanks!

@fursund
Hm, the earphones image cleared upp extremely quickly, so it looked good within 5-10 minutes, but I let it run for about 30 minutes or so just just to get it a tad cleaner.
The trumpet image took 3-4 hours, mainly to clear out the glossy reflections on the front part of the trumpet.
The robot girl image took 4+ hours, where the last hour or so was spent clearing out the metal parts around the shoulders, and a tiny part of the chin.
All images were internally rendered at double the resolution seen here, and then downsampled with a filter for display, although I doubt that has any greater performance
impact as the renderer only updates the display image every 2 minutes.
The renderer is written in Java btw.

@ingenious
Both the trumpet and the plastic use a configurable phong material. The trumpet has no diffuse color though (and a lower exponent), hence the more metallic look.

beason
Posts: 47
Joined: Sat Dec 10, 2011 1:58 am
Location: Los Angeles, CA

Re: A couple of renderings

Postby beason » Wed Dec 21, 2011 2:38 am

Very nice :) Why did you need MLT for the robot girl?

Thammuz
Posts: 22
Joined: Mon Nov 28, 2011 8:36 am
Location: Stockholm

Re: A couple of renderings

Postby Thammuz » Wed Dec 21, 2011 8:26 am

@beason
After a test render with no mlt I noticed that the (flat) background cleared up quickly, whereas the plastic/metal highlights didn't, so I figured that in the end a lot of samples would be wasted on the background (which doesn't have too much visual importance). So, I decided to use mlt just because it concentrated more effort on the brighter parts of the image, and it worked well.

h3nk3
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Joined: Thu Dec 29, 2011 11:41 am

Re: A couple of renderings

Postby h3nk3 » Thu Dec 29, 2011 11:42 am

Awesome pictures. Nice work man.

spectral
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Re: A couple of renderings

Postby spectral » Wed Jan 11, 2012 12:16 pm

Looks great, I like... :-)

And for the lights, do you use spectral rendering, blackbodies emitter and/or an IBL/environment light ?
Spectral
OMPF 2 global moderator

Thammuz
Posts: 22
Joined: Mon Nov 28, 2011 8:36 am
Location: Stockholm

Re: A couple of renderings

Postby Thammuz » Wed Jan 11, 2012 1:23 pm

Thanks!

Yes, I use a binned spectral color representation internally (Smits), but I'm not too happy about the binned approach so I'm planning on implementing stratified wavelength clusters instead, or go for a single random wavelength approach.

All images use planar (mesh) emitters, with rgb colors (converted to spectral internally), thus no HDR/IBL was used.

spectral
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Re: A couple of renderings

Postby spectral » Wed Jan 11, 2012 1:39 pm

Great,

Don't use "single" random wavelength approach, because you have to do several samples to obtain the right color and so it request more time ! Something you can try is to use a set of random wavelength that you choose with MLT, by example ;-)

But why the background color is grey with the robot women then ?
Spectral
OMPF 2 global moderator


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