Simple Renderings Thread

[pixie]

- The mismatch between lighting and background

even with the bluest sky ever outside, my home with white walls stays white for my eyes, no blue tint...

That's because you have one of the finest cameras in the world!

[ENSLAVER]

Something for vday, bit late in posting

[cotty]

Some pictures of my new neocube (216 little magnetic spheres with d=5mm)...
(Search for neocube on youtube for more details)

Cotty

[Doug Armand]

Something for vday, bit late in posting

hehe that is a neat image

[PureSpider]

My latest ring design!

[djegoo]

Some pictures of my new neocube (216 little magnetic spheres with d=5mm)...
(Search for neocube on youtube for more details)

Cotty

hey i have one of these at home, it s uber cool to play with

[PureSpider]

Some pictures of my new neocube (216 little magnetic spheres with d=5mm)...
(Search for neocube on youtube for more details)

Cotty

I got one with golden spheres!
So amazing

[galinette]

(Search for neocube on youtube for more details)

Damn! I want this!

[dcm]

i have neocube (not neo from this forum ) and its pretty coooool. But i damaged my watches with that lol

[cotty]

Here is a little LED test:
left: Sketchup model with the original picture
middle: a little surrounding light for illumination of the whole picture
right: LED with active emitter

Render settings:
BiDir MLT
2 light layers
24h rendertime
surrounded by exit portal

Is there a chance to get better (faster) results of a scene like this?

Cotty

[ENSLAVER]

Wow, nice work cotty, I remember seeing a thread about leds on the maxwell forum along time ago, it was quite an extended discussion....

I think leds will always be pretty tricky to render in an unbiased engine, not a lot you can do to speed it up without losing quality somewhere.

[CTZn]

Nice !

surrounded by exit portal

I don't believe that there might be any improvement from that, did you manage a test prior Cotty ? The scene bounding box itself is doing the trick, exit portals have no use that I know of while no environment is used. However if you did use part of an environment for the outer lighting that may be correct

Eventual improvements may come from rendering modes/options. Fiddle with that, w/ & w/o Glass Acceleration, bidir etc.

PS: the legs might be meant as cylindrical, if I grant the dotted lines to be axis. Ah no scratch this, I overlooked the section from the top view

[cotty]

... did you manage a test prior Cotty ? The scene bounding box itself is doing the trick, exit portals have no use that I know of while no environment is used.

Eventual improvements may come from rendering modes/options. Fiddle with that, w/ & w/o Glass Acceleration, bidir etc.

Thank you for your suggestions! I have tested with an without exit portals and you are right, there is no noticeable difference. The use of exit portals without an environment leads to an error message "Can not use exit portals without defining a background material. (constant, sun/sky, environment map)" and I turned the environment on without using it (surrounding box is closed). I have already imagined that this would not be the best way.

Because of the great render time I didn't change the other mentioned parameters yet...

Cotty

[Pibuz]

...a light inside solid glass? I don't think you will ever notice GREAT speed improvements, I fear..
BTW this is an interesting test Cotty! No IES profiles used, I assume.
I saw that most of the times using a proper IES profile will save you some..time! You could try that!

Let us know!

[cotty]

No IES profiles used, I assume.
I saw that most of the times using a proper IES profile will save you some..time! You could try that!

I tried to produce a realistic picture of the LED itself, so I put the emitting cube in the glas as produced in reality and you are right, it is a comparable slow
If the goal ist only to reproduce the light of the LED, the IES-way would be much faster and more accurate (I think) because the LED-manufacturer show the directional characteristic in their documentation but not the inner construction of the LED...
Cotty