Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: Stan_But on 2013-08-05, 17:03:36

Title: reflection of constantmat VS reflection of emitters and lights
Post by: Stan_But on 2013-08-05, 17:03:36
Don't know if this bug or not, but if it's possible to do reflection of constantmat so bright as reflection of emitters and lights

example and scene are attached
Title: Re: reflection of constantmat VS reflection of emitters and lights
Post by: maru on 2013-08-05, 19:58:44
No problem here. Can you save to max 2013?
Title: Re: reflection of constantmat VS reflection of emitters and lights
Post by: Ondra on 2013-08-05, 20:25:00
This is a feature for some reflections (but not others, like maru's) - it is a slight bias caused by using non-zero max sample intensity + nonshaded mtl, because nonshaded MTL is not treated as a "full light". This has some advantages and some disadvantages, such as this bias you have encountered. If you set max sample intensity to 0 (special unbiased setting), you will get the same reflections from both

(http://i.imgur.com/CzvVs1N.jpg)
Title: Re: reflection of constantmat VS reflection of emitters and lights
Post by: Stan_But on 2013-08-05, 20:25:16
Thanks for answers guys
I know about MSI 0 or more 1000 for example 
I ask for equal reflections with default MSI 20. It is not possible?

scene in 2012 attach
Title: Re: reflection of constantmat VS reflection of emitters and lights
Post by: maru on 2013-08-05, 21:06:12
Why do you need a constantmtl?
Title: Re: reflection of constantmat VS reflection of emitters and lights
Post by: Ondra on 2013-08-05, 21:43:04
no, you either need to go unbiased, or use proper CoronaMtl with emission, to get 100% same reflections
Title: Re: reflection of constantmat VS reflection of emitters and lights
Post by: Stan_But on 2013-08-06, 00:33:22
Quote
maru: Why do you need a constantmtl?

for some speed optimisation with meshlights because emitters do noise much more than light with "meshlight" from constantmat

Quote
Keymaster: no, you either need to go unbiased, or use proper CoronaMtl with emission, to get 100% same reflections
ok, Ondra)) the question is closed