Vray Artifacts and Splotches

[alywhosane]

Hello Peeps,

I need help. If y'all look at the picture i am having a problem with the artifacts on the wood cladding that i did . Those black splotches are really a pain in the wrong place. I'd really appreciate any help.

My settings are simple : Vray 1.5 SP1

LC 1000
Brute Force : SUB : 30 I increased the sec bounces to 10 even if i leave it to the default value 3 i still have the same problem.
Color mapping : Exponential.
Vray Sun default settings.

[Bam]

Sorry mate but I dont see anything wrong in this O_o Can you mark the spots themself?
Im a noob so my noobish eye cant see anything =) ask the pros :D

[shashanks18]

hey Aly...well the splotches are quite a problem in Vray....so wat to do wid it??? nuthin, have patience n give a nice high quality render which'll ofcourse take more time but better results

i generally use Irradiance Map in primary bounces n Light Cache in Secondary. Fr quite a good quality render, Irradiance Map can be set to high, n subdiv to 50 n Interpol. Samples to 20.

In light-cache, Subdiv 1000 or abv, Samples 0.01 or less n number of Passes 6 or more.

also in RQMC sampler, noise threshold to 0.001

Image Sampler to Adaptive QMC n Antialiasing Filter to Mitchel - Netravali

hope tis solves the problem, if any more, plz dnt hesitate in askin :)

Cheers!!!

[alywhosane]

Hey shashank thanks yaar will surely try it out and get back to u..:)..

[alywhosane]

Thanks once again shashank..it really helped..yes indeed it did increase the render times too . However over all the quality was great :)...

[alywhosane]

will do that man..thanks alot..and will post my image soon..since my pc is going haywire on me i have to be very patient wit it..

[shashanks18]

hwy dats gr8 to knw it helped :) wud like to see the new output :D

btw, i evn have a tutorial on Vray wid HDRI lighting on this website...if ye wud like to check out:

Welcome to 3DM3.com - World's Computer Graphics Community

Cheers!!!

[alywhosane]

Hey shashank..how u doing..i've been doing some renderings and the artifacts solution was great..thanks alot. Now i have a question do i need to change the render settings if i am rendering the interior too. As in when i render the exterior can i keep the same settings for the interior coz i have tried it but unfortunately its not giving a good result.Can you please advise. BTW i just rendered the exterior and i also changed the entire thing.
[IMG][/IMG]

[shashanks18]

Hey Ali, this render looks nice to me!

For interiors, you may have to change certain light settings, according to the brightness and stuff. Though i use similar Engines in exterior and interior, both; i.e. Irradiance Map for Primary Engine n Light Cache fr Secondary Engine.

But the sampling may have to go more up, as interiors give much more spotches. Also, you may have to add extra lights frm windows or doors, wherever the light comes from. I do it with Vray Plane Light.

Try the stuff out. And don't hesitate in sharing your renders, good or bad :)

Cheers!!!