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Messages - marioteodoru

Pages: [1] 2 3 ... 7
1
The first reason for people to get Corona, was to escape Vray! You just pissed off, all your user base! I can't beleive that. You guys had the potential to remove Vray from existence. But you've been borged.

2
[Max] I need help! / Re: reflective label
« on: 2016-11-06, 12:47:38 »
this worked great. Thank you, again!


3
[Max] I need help! / Re: reflective label
« on: 2016-11-05, 17:46:34 »
Thank you for you answer romullus.
I had no idea! i'm getting a very metallic feeling. I'm actually trying to make a plastic bag.
Any more tips ? :D


4
[Max] I need help! / reflective label
« on: 2016-11-05, 14:40:47 »
Hello.
How do i proceed with creating a layered material for a label? I need to make a material that has a image as diffused and a coating of reflective layer over it. Right now if i make a Layeredmtl and i make the second layer reflective i can not see the second layer underneath.  If i make it transparent, i end up seeing the object beneath it not the layer from th material.

5
Gallery / Re: Some tests
« on: 2015-12-30, 06:59:24 »
wow

6
[Max] I need help! / Re: SSS Pancake
« on: 2015-12-22, 08:37:07 »
I also wonder if this Glossy Falloff Curve could be important in my case. I really don't understand much of the technical terms, but my object is at an angle, and it sure has a micro structure, and i do have issues with getting the right reflectance. https://forum.corona-renderer.com/index.php/topic,7981.0.html

Any thoughts?

thank you.


7
[Max] I need help! / Re: SSS Pancake
« on: 2015-12-21, 21:54:39 »
I am more and more convince, that this issue will resolve trough displacement.  I am trying to replicate the actual texture, but i find procedural noise very difficult  to control. 
Is it possible to translate a bitmap to a procedural noise?

8
[Max] I need help! / Re: SSS Pancake
« on: 2015-12-21, 13:19:01 »
Hey maru,

sure, i've sent the link trough the ticket support.  Thank you!



9
[Max] I need help! / Re: SSS Pancake
« on: 2015-12-21, 11:27:30 »
Sent.
Thank you Rawa!

10
[Max] I need help! / Re: SSS Pancake
« on: 2015-12-21, 10:00:14 »
I can make a nice pancake material if someone provides me with a pancake model :)
I can make a nice pancake model if someone provides me with a 3d scanner. :)

Hello,

I can provide my model, just tell me where i can upload the file

11
[Max] I need help! / Re: SSS Pancake
« on: 2015-12-20, 06:03:47 »
As for whether to use translucency, opacity or refraction, this post by Ondra helped me a lot. You may want to look at it: https://forum.corona-renderer.com/index.php/topic,8715.msg57294.html#msg57294

Thank you.very  interesting thread. I don't know why but for me Ref 1 with glossines looks nothing like translucency. I don't know why... i'll make some comparative test.

true, that's clarified a lot for me

in your case you surely should be using translucency or refraction with low glossiness which could be a bit faster to render


I am using translucency. It seems no matter what i do, even if now it looks much better. I don't seem to get nowhere near a reallistic appetising feeling. I'm starting to beleive that a better solutions would be to build a more accurate geometric model.

I don't mean to be rude, but your example doesn't reflect the quality i'm looking for. It becomes more clear to me, that, considering corona light goes as real light so, the geometry should do the same.

Thank you guys for you're input

12
[Max] I need help! / Re: SSS Pancake
« on: 2015-12-19, 12:11:05 »
Well,  i think i found the solution.
First i need to apologize for bashing sss. It seems to work once you start to understand the basics :D . Thanks again maru. Also it seems the fuziness i was looking for comes from displacement rather than sss.

 Render selected feature is a  life saver!

I'm still not sure if my particular object need Translucency or Opacity. I still don't get the relation between this two or if they are supposed to be used together or not.

All is left to do for me is fine tune this and i think i'll get what i want in the end.

13
[Max] I need help! / Re: SSS Pancake
« on: 2015-12-18, 18:31:27 »
Hi,

i got a little progress today. I've added displacement over the bump. This bring a little more fuzziness from the geometry perspective, but the texture feeling is still not there.
I think i'm missing a refl. color map but i'm not sure what to derive it from  because i have a bump map and a different displacement map. 

The main issue now is that by adding displacement map and reducing opacity plus sss, increases the render time a lot! Corona interactive is very slow for this scenario on my system.
It does'n even update, or it does but in like 5 minutes. So what i'm left with is changing by  .1 for a parameter, rendering for 50 passes which means 1 hour in this scenario.

Maru, your explanations did help me, but i still have some clarifications i need.

Do i need a difuse map? If yes, what value? smaller than 0.5 or bigger? I have to say that this 0.5 default value make no sens to me. I just don't get it. Why not 1?  why not 100 ???! Isn't the Color correction map used for increasing brighness? Why all that values sistem that i don't get. I mean i get it. 0.5 it's like 100% over 0.5 is multipling, under is reducing. BUT IS SO CONFUSING! At least to me.

Do i need to use Translucency or Opacity or both ? What color should translucency be? How is the 0.5 paradigm working for translucency? Because to me from  0.5 to 0.6 there's a big jump in intensity, stronger than between 04. to 0.5 .

It's ok if i use the diffuse map, brighten for the Absorbtion and Scatter colour?

using a map for the opacity value  renders the numerical vale mute? Or it still affects?

Thank  you for your advice and i hope you can help me with more answers. I did apply for a ticket.. didn't get an answer yet.


14
[Max] I need help! / Re: SSS Pancake
« on: 2015-12-17, 20:44:51 »
Thank you so much maru. your explanations are great and thank you for taking your time to wrote this to me. I do have some basic knowledge of shading and i know what most of the attributes mean.

i will try to approach the shader again, and if i don't succeed, can i ask help? I mean, this is not basically a bug or something. I don't even know what kind of problem this is. So i can get assistance in getting the shader i need? Some one can look at my file and help me solve this? Is it for free? 

Am i to understand that if i construct the shader correct, i will get the effect i want ? I don't even know now, if i think about it, if i should have sss. maybe i should just put a little opacity. but how do i get the fuzzyness ? Is is possible that the only way to do it is to model the macro geometry of the crust? Man, i did a lot of research on pancakes and bread, and porous structures. I even build the inner core with a voxel and voronoi. But i get very dense geometry, and it still doesn't look right. O the other hand, the only "pretty good" bread i've seen it the pixar one in ratatouille. And they build a special shader for it.

So, has anyone any idea, if what i'm looking for is determine by sss, or can be simulated with sss, or do i have to build the actual geometry?

I hope i didn't bother anyone with my tone. I'm just really frustrated. I should've finish this project weeks ago, and i got stuck in this point.

Thank you for your time maru.

15
[Max] I need help! / Re: SSS Pancake
« on: 2015-12-17, 12:04:06 »
Hello,

i'm back with some updates. I am trying the following process. Split my mesh in 3 parts. The outer shell, the inner core, and the chocolate filling.

I have to say, am very confused. I CAN NOT UNDERSTAND THE RELATION BETWEEN Translucency, Absorption, Scattering and Opacity. And, again, please excuse my caps, but
I SHOULD'N HAVE TO SPENT 2 WEEKS TRYING TO GET THE RIGHT SSS IN THE MIDDLLE OF A DEADLINE.

The help section is quit general. Like use any other color than white. Really ?!?!  I did some tests and the relation between  Absorption colors and scattering colors is totally random for me. I have no special knowledge in sss, but from my research you need to make special measurements to determine sss colors.
Anyway, let me get back, sorry for the rant.

I am trying to get that fuzziness specific to this kind of objects. I tried endless combinations.  The only factor that seems to bring me closer to what i want is OPACITY. But i don't understand. For me opacity is ... .... actually what is opacity? I consider it is transparency. But do pancakes have transparency? I tried adding different noise to the surface, but i don't get there yet.
What is most confusing to me, is that it seems that increment values like 0,001 have a big influence, but big values like 500 for absorption does nothing. Is absorption sensing the real with of the object and stops when it reaches the limit?

I acquired this render engine hoping i will get out of the maxwell infinite rendering times, but it seems i got nowhere. Actually a 1 million poly object with sss and opacity puts corona down in a never ending initial pass. How do i get fuzzy SSS?!?! Do you guys have something like a customer care service or something? Can i pay to have my problem solve or do i have to get back to maxwell?

Thank you.



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