[User-list] [SPAM] Re: i have a pen..

Artur Żmudzki azmudzki at poczta.onet.pl
Fri May 19 18:27:33 EEST 2017 

Hi All,

Definitely good advices regarding GI settings. For me one of the most 
important ones was GI brightnes which introduces some nice dynamic in 
scene lightning.
Like you guys I spent hundreds of hours tweaking the setttings. I use 
(used to?) different curves for interior and exterior lightning.
Have a look at the attachments. BTW, sometimes I left some noise by 
disabling blurring at all as in my opinion sometimes it just kills GI in 
Realsoft.
It's better I think to adjust ray counts for a while and decide what 
level of rendering time is acceptable for us while working with the object.

Best Regards,
Artur


On 2017-05-18 00:51, Mark Heuymans wrote:
>
> Hi Robert,
>
> All good advice, nice to see the list is still alive :)
>
> I saw that you're using Global Illumination. A very difficult and 
> complicated feature in RS3d !
> The infamous Garry and me did some heavy testing, trying to optimize 
> GI settings in RS... must be at least a decade ago.
>
>
> But computers in 2017 are dream machines compared to the noisy heavy 
> monsters from those days. RS runs fine on a cheap multi-core 64-bit 
> machine with 16 gigs of ram, so on such a machine we can crank up 
> these settings:
>
> - increase Ray Count in the GI material: makes use of all the CPU 
> cores, including hyperthreaded. The higher the better, unfortunately 
> it's maxed out at 100 by a slider (v6)
> - decrease Blur Level and Blur Iterations in Post Image Effects. But 
> beware: if it's too low, noise is introduced.
> - perhaps modify things like GI_blur_reflected, GI_brightness_control, 
> blurwidth_control
>
> Or export the scene as .obj and render with other software.
>
> Good luck!
> Mark H
>
>
>
> Op 16-5-2017 om 19:29 schreef Robert den Broeder:
>>
>> Many thanks Jan! Will try! And of course I will post updates of my 
>> image to show my progress.
>>
>> Initially this started as a test if I could make the pen… now it 
>> should become more interesting than that ;- )
>>
>> Best regards,
>>
>> Robert
>>
>> *Van:*User-list [mailto:user-list-bounces at realsoft.com] *Namens *Jan 
>> Schmitz
>> *Verzonden:* dinsdag 16 mei 2017 18:22
>> *Aan:* user-list at realsoft.com
>> *Onderwerp:* Re: [User-list] i have a pen..
>>
>> Hi Robert,
>>
>> in addition to Lees excellent mail, I'd like to give some further 
>> suggestions. I quickly pulled the image into photoshop and sketched 
>> the things that can be improved, to gain a more realistic and more 
>> appealing render. (Download the image and toggle between the to 
>> versions, to see the adjustments better).
>>
>> 1. Clean reflections: In product photography you usually don't want 
>> to see the whole room in the reflection, so you set up a bunch of 
>> grey to white gradients, that appear in the reflections. This helps 
>> us to instantly recognize the material as a chrome material.
>>
>> 2. The cap at the end of the pen doesn't seem to have a shader, it 
>> renders constant black. You'll need something there, that resembles 
>> plastic or rubber and gives some smooth reflections. (As Lee already 
>> said)
>>
>> 3. The camera is very telephoto, so you'd expect some depth of field.
>>
>> 4. The wood texture needs a lot more contrast.
>>
>> I hope this helps, the pen looks really nice!
>>
>> Kind regards,
>>
>> Jan
>>
>>
>> Jan Schmitz
>> Meyerheimstraße 1
>> 10439 Berlin
>>
>> +49 151 418 431 04 <tel:+49%201514%201843104>
>>
>> On 16 May 2017 at 17:44, Robert den Broeder <r.den.broeder at chello.nl 
>> <mailto:r.den.broeder at chello.nl>> wrote:
>>
>> Thank you for your time and comments Lee!! Much appreciated. I'll try 
>> to work with your suggestions and see how it turns out.
>>
>> Best regards,
>> Robert
>>
>> Verstuurd vanaf mijn iPhone
>>
>>
>> > Op 16 mei 2017 om 17:30 heeft leee <leee at spatial.plus.com 
>> <mailto:leee at spatial.plus.com>> het volgende geschreven:
>> >
>> >> On Sunday 14 May 2017 16:29:37 Robert den Broeder wrote:
>> >> Hi all,
>> >>
>> >> Today I created a pen in RS3D and did some GI rendering tests. 
>> What can I
>> >> do to improve image quality?
>> >>
>> >> Regards,
>> >>
>> >> Robert
>> >
>> > I think it's fair to say that, in 3D, if you're going to make something
>> > reflective then you should make sure there's something to be 
>> reflected by
>> > it.
>> >
>> > In your image, the tip of the pen appears to be reflective and the 
>> lower
>> > half is reflecting the desk upon which it sits but the upper half just
>> > looks almost flat-black.  The clip also suffers from the same 
>> problem - it
>> > looks too 'flat'.
>> >
>> > Assuming that you want to portray the pen on a desktop, I'd place 
>> the entire
>> > scene within a hollow analytical cube and parallel map some stock 
>> office
>> > wall photographs to each of the 'walls'. Depending on the angles, I 
>> might
>> > also fake an office light on the ceiling.
>> >
>> > The black cap at the clip end of the pen, which looks as though 
>> it's not
>> > intended to be reflective, doesn't show any detail to 'fill out' its
>> > shape - you can't separate the cylinder wall from the endcap and 
>> you can
>> > only tell that it's a short cylinder from its profile/silhouette - 
>> playing
>> > around with its specular properties and adding a small amount of 
>> reflection
>> > should enable you to get some differentiation between the cylinder 
>> walls
>> > and the endcap.  I can see a narrow strip of specular reflection 
>> along the
>> > barrel and clip extension, and that looks good, but I'd extend that 
>> to the
>> > endcap and at the same time make it a little more diffuse, so that the
>> > specular strip is wider i.e. spreads further around the 
>> circumference and
>> > covers a greater arc than on the barrel.  Is the endcap slightly 
>> domed?  I
>> > can't tell because of the lack of depth but if it isn't then I'd 
>> make it
>> > so.
>> >
>> > Last thing I'll mention is the tiling of the desktop material - this
>> > wouldn't be a problem if you were going to crop the image - but this is
>> > 3D - just don't render what you don't need.
>> >
>> > Yes, I'm being nit-picky here, but making something photo-real is 
>> all about
>> > the details.
>> >
>> > LeeE
>> >
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>>
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