A couple of renderings back

(L) [2011/12/20] [ost by Thammuz] [A couple of renderings] Wayback!

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: [LINK http://www.blendswap.com/3D-models/characters/neeloo-robot-women/]
By: Yoji - [LINK http://www.blendswap.com/3D-models/author/yoji/]

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

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

The images:

(L) [2011/12/20] [ost by fursund] [A couple of renderings] Wayback!

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

(L) [2011/12/20] [ost by ingenious] [A couple of renderings] Wayback!

Nice materials and lighting. What are the materials on the trumpet and the white plastic on the robot?

(L) [2011/12/20] [ost by Thammuz] [A couple of renderings] Wayback!

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.

(L) [2011/12/21] [ost by beason] [A couple of renderings] Wayback!

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

(L) [2011/12/21] [ost by Thammuz] [A couple of renderings] Wayback!

@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.

(L) [2011/12/29] [ost by h3nk3] [A couple of renderings] Wayback!

Awesome pictures. Nice work man.

(L) [2012/01/11] [ost by spectral] [A couple of renderings] Wayback!

Looks great, I like... [SMILEY :-)]

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

(L) [2012/01/11] [ost by Thammuz] [A couple of renderings] Wayback!

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.

(L) [2012/01/11] [ost by spectral] [A couple of renderings] Wayback!

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 [SMILEY ;-)]

But why the background color is grey with the robot women then ?