[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/bbcode.php on line 488: preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4756: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3891)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4758: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3891)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4759: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3891)
[phpBB Debug] PHP Warning: in file [ROOT]/includes/functions.php on line 4760: Cannot modify header information - headers already sent by (output started at [ROOT]/includes/functions.php:3891)
Kerkythea Rendering System • View topic - strange reflective border
FAQ  •  Register  •  Login

strange reflective border

Moderator: ModeratorGroup

<<

dAn84imola

KT-Senior

Posts: 52

Joined: Sun Nov 06, 2011 6:19 pm

Location: Imola (BO) - Italy

Post Mon Nov 10, 2014 10:29 am

strange reflective border

Hy render dude! I've got a quest for all the expert :idea:

Sometimes when i use default glossy, shiny or brushed materials (like metals, mirrors...) on some borders i obtain strange artifacts reflection (see image below). I tried to follow the also know and useful tutorial "sparkles, black and white dots, noise on materials?" without any improvement ](*,)

Could anyone help me?
Thank's for supporting! :mrgreen:
Attachments
wtf.jpg
you're welcome to visit my portfolio
www.danilovincenzo.it
<<

tridem

KT-Master

Posts: 982

Joined: Tue Aug 04, 2009 9:25 pm

Location: Treviso - Italy

Post Tue Nov 11, 2014 7:53 am

Re: strange reflective border

:-k I'm not sure is an artifact as it rather seems a reflection. Could you share the scene to check it?
<<

dAn84imola

KT-Senior

Posts: 52

Joined: Sun Nov 06, 2011 6:19 pm

Location: Imola (BO) - Italy

Post Wed Nov 12, 2014 7:51 am

Re: strange reflective border

Grazie 1.000 Tridem ;)
Waiting for your suggestion.
Don't know if would help but I observed that it happen "always" with closed view (even with big re-scaled model) and there is no difference if the faces are perfectly "touched" or separated :roll:
Attachments
v1.kzx
(572.13 KiB) Downloaded 405 times
you're welcome to visit my portfolio
www.danilovincenzo.it
<<

tridem

KT-Master

Posts: 982

Joined: Tue Aug 04, 2009 9:25 pm

Location: Treviso - Italy

Post Wed Nov 12, 2014 10:59 am

Re: strange reflective border

ok, guardando più in dettaglio c'è effettivamente un artefatto oltre ai riflessi molto accentuati dovuti al materiale.
Ho comparato diversi metodi e si nota che MLT e BPT risolvono meglio, mentre photon map e path tracing evidenziano le fessure luminose.
Per come la vedo io è un problema di volumi non chiusi capita spessissimo con sketchup, cioè le facce sono perfettamente adiacenti ma vengono comunque viste separate e non unite, infatti ho provato a dare da KT il comando weld vertices e le cose cambiano.

At a deeper look there's indeed an artifact, apart from the very bright reflections which are due to the material.
I compared several methods and you can notice that MLT and BPT can solve better while Photon map and path tracing have those lighted cracks.
IMHO is rather a modeling issue related to unclosed volumes, it happens very often with sketchup to have faces perfectly bordering but actually not united, I tried the operation weld vertices within KT and it seems working good.
Attachments
test.jpg
<<

dAn84imola

KT-Senior

Posts: 52

Joined: Sun Nov 06, 2011 6:19 pm

Location: Imola (BO) - Italy

Post Wed Nov 12, 2014 1:01 pm

Re: strange reflective border

Ok grazie ancora! Ma ti chiedo:
1- c'è un procedimento più corretto in SU da seguire per evitare a priori questo problema durante la modellazione?
2- intendi "vertex welding"? come lo si utilizza? funziona on/off o qualche variabile?
A questo punto, volendo applicare una materiale estremamente specchiante (cromo lucido) c'è una tecnica più intelligente per ottenere un risultato più realistico?

Ok, thank's a lot! But:
1- is there a more proper way to model in SU in order to avoid this problem?
2- you mean "vertex welding"? how does the command work?
In this way, i had to use an extremely reflective material (like chrome metal): is there some other tips to obtain a shot more realistic?
you're welcome to visit my portfolio
www.danilovincenzo.it
<<

tridem

KT-Master

Posts: 982

Joined: Tue Aug 04, 2009 9:25 pm

Location: Treviso - Italy

Post Wed Nov 12, 2014 2:38 pm

Re: strange reflective border

I made some other test with different materials... after all, it seems more likely a smoothing issue than of vertex welding :oops:
anyway I'm pretty sure it's related to the geometry, the gloss material just emphasise the matter.
test2.jpg



I cannot give you advices on how to avoid strange behaviours of the sketchup's model except working very clean without messing the objects

as for improve realism for reflective metals, I think the most important thing is taking care of the details - for example always bevel the edges (as perfectly sharped edges doesn't exist in real world!); rounded edges perhaps would be more accurate but it's quite difficult then to manage the normals and it increases the model dimension - I believe a simple bevel do the work
test3.jpg

Return to Galleries - Work in Progress

Who is online

Users browsing this forum: No registered users and 4 guests

cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group.
Designed by ST Software for PTF.