Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: cecofuli on 2014-03-10, 23:18:32

Title: Opacity bug?
Post by: cecofuli on 2014-03-10, 23:18:32

Hi,
as you can see, something is strange on the opacity map. Look at the leafs edges...
In attachment the 3ds max file.

(http://www.francescolegrenzi.com/Temp/Corona/0041_OP_BUG_Render.jpg)

(http://www.francescolegrenzi.com/Temp/Corona/0042_OP_BUG_Shader.jpg)

Title: Re: Opacity bug?
Post by: cecofuli on 2014-03-10, 23:35:36

Real example.
Also, look at the rendering time vs pass
Wit Opacity ON, we have a big slowdown! -20% =(

(http://www.francescolegrenzi.com/Temp/Corona/0043_OP.gif)

Title: Re: Opacity bug?
Post by: Polymax on 2014-03-10, 23:41:32

try reset render

Title: Re: Opacity bug?
Post by: cecofuli on 2014-03-10, 23:51:36

Same problem, same slowdown.

Title: Re: Opacity bug?
Post by: Polymax on 2014-03-10, 23:56:04

attached pictures don't load ( i don't understand problem

Title: Re: Opacity bug?
Post by: cecofuli on 2014-03-11, 00:09:18

Now? Maybe because you live in Russia, I think... 

Are you able to see my website? www.francescolegrenzi.com
If not, try with a proxy server.

Title: Re: Opacity bug?
Post by: Polymax on 2014-03-11, 00:19:20

yes, slowdown (~20%), but maybe it's normal? Because with refraction slowdown more. Or need to compare with a5.

Title: Re: Opacity bug?
Post by: cecofuli on 2014-03-11, 00:28:36

I don't know. But it's a lot for a single, small bush inside an empty scene. Don't you think?
About A5, I don't know. I have to install. Now I'm lazy )) Try tomorrow
I would like to read Ondra opinion about that.

Title: Re: Opacity bug?
Post by: gabrielefx on 2014-03-11, 09:16:46

bitmap filter?

turn it off

Title: Re: Opacity bug?
Post by: neri69 on 2014-03-11, 09:31:23

In 3dsmax MR this slowdown is quite normal.
For example is true that when you have trees with a lot of leaves is convenient to shape the leaves (i use exlevel for this...) instead to use opacity. When you make Hedges for examle sometimes when they are very dense with small leaves you disable also shadow.
But maybe this is a behaviour of MR....

Title: Re: Opacity bug?
Post by: Ondra on 2014-03-11, 20:16:08

Fixed, but massive testing will be needed

Title: Re: Opacity bug?
Post by: cecofuli on 2014-03-11, 20:24:29

And, what about speed? Is it normal -20% slowdown? =(

Title: Re: Opacity bug?
Post by: Ondra on 2014-03-11, 20:29:58

the bugfix I did might help. But in general, A6 will report lower rays/s even though it will do more work with those rays

Title: Re: Opacity bug?
Post by: cecofuli on 2014-03-12, 00:55:42

Ok, thanks for the info =)
But my question was about the slowdown with and without opacity map (with A6). -20% it's a lot in my opinion...

Title: Re: Opacity bug?
Post by: Ondra on 2014-03-12, 09:14:17

the same thing applies: when opacity is present, A6 will do more work with less rays/s. It is also dependent on a scene, 20% in simple scene is entirely different story than 20% in a production scene.