Chaos Corona Forum
General Category => Gallery => Work in Progress/Tests => Topic started by: bdazo on 2014-03-02, 04:49:02
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Hello guys,
First time posting here. I'm really liking Corona and have a scene for crits.
I originaly made this with vray and ported the scene to corona.
What you think so far? It rendered for almost. 2 hours, but i still have heavy noise on the back wall, behind the computer. Any tips on reducing that noise?
Thanks
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how many processors you used?
the room is closed? what's behind the camera?
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The rest of the scene looks fine. Isn't this bump map? I can also see noise on the white wall to the right but I'm pretty sure it's reflection+bump. Maybe overlapping faces?
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gabrielefx: How do you I set the number of processors to use? The room is closed, there's nothing behind the camera.
maru: I just checked and in fact there was a bump map in the wall material. I did a region render on that area without bump and I think it was that. In 15 minutes the noise cleaned a lot better then how it was.
I like to add the bump to add that texture to the wall, rather slightly. Could this be a bug on the A5 release or I need to tweak settings? I'm using HD cache with default values.
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There were some problems with bump in A5 but don't worry, it's fixed.
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got it.
I'm working on the scene, going to let it burn for a couple of hours and will come back with the result.
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Nice image ! :)
Post more scenes to ask for Daily builds Acess. It´s cleaning the scenes much better and faster in many cases.
Are you using PT-PT or PT-HD (Primary and secondary solvers)... Try PT-HD and render again. :)
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Hi marcelo. Im using pt-hd now. I left it rendering while I watch Transformers on tv, will post back. Really want to get daily build access :)
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WHat you think guys? pt-hd, about 130 passes, I think. 2:43 hours rendering.
THere's still some noise on the back of the monitor there. The wall doesnt have bumps or anything in the reflection slot like in the other walls, but Im still getting that noise there, any ideas?
Im ready to move to the sunset and night lighting on this one.
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Set "lights samples multiplier" to 1?
Can you show us the noisy material's setup?
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Maru, lights sample multiplier was set to 2.
Here's the noisy material setup.
Will try a new render with that lights mult set to 1 and see.
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What is that map in reflectivity slot? Is it really needed?
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That's to give some iregularity to the reflection, something I've been testing. All the walls have it, but the only wall that doesnt clean the noise as nice as the others is that one on the back of the monitor.
Could it be something related to shadow sampling? or it shouldn`t have anything related to that?
On my initial renders I didnt have that on, it was a white solid material with some reflection, that wall on the back of the computer was still noise heavy, compared to the other walls.
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Hey guys,
New render of the scene. I'm caling it done and will start on the night scene of that same scene. PT-HD, with about 350 passes and 3 hours rendering. In about 2 hours it had a pretty good noise aceptance level, but that wall area on the back of the computer was really bad, so I let it burn for another hour.Still, if you compare that area with the other walls you can still see some noise, I have no idea how to get rid of it, I'll just wait for A6.
I like it so far anyways, amazing render. Thanks for doing it Andro ;)
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I would say it's because of that reflectivity, but not saying it's problem of the material. Such glossy surfaces can prove hard to sample if they're so occluded in the space, and I definitely experienced that on quite many occasions, and it would just took great deal of time to resolve.
I think the solution here is only adaptivity, as it's indeed only few spaces that keep the noise.
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What map is applied in the reflectivity/glossiness slots? If it's 350 passes then I would guess it's not caused by bad antialiasing and it doesn't look like noisy GI. It looks like a bump map or some other kind of texture so I bet it's your reflectivity map. Maybe it's not mapped properly?
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Juraj: How do I turn on adaptivity to get rid of that noise? Is it something already implemented on A5?
Maru: I took that map off, it was a sort of PNG dirt map. I left the walls white and add some reflection, the white color is RGB 180, as a proper albedo. The thing is that even now without the maps in the reflection slot, it still takes ages to clean that area and it's never as clean as the rest of the walls or the overal render. You will see that clearly on the next render I'm about to post. I left it rendering overnight, it was 3393 passes for 8:30 hours and although now the noise is quite better, there's still diferences between the other areas that are very smooth and noise free.
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Here's the render with curtains. I felt the other renders were cool but the sun was to hard, a friend pointed that someone working on that computer would have a terrible time and it's true indeed. I could lower the sun intensity as well, but Im calling it done for this day light scene, going to start on the night version of it.
Thanks to Rawalanche for the curtain material http://forum.corona-renderer.com/index.php?topic=231.0
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I'm starting to light my scene for the night time. I have a few questions:
1 - I used vray HDRI map to add that ilumination into the scene( used moon lit HDRI). I put the vray HDRI into the enviroment slot and that was it, did I do it correctly?
2- I read in the forums that there are a corona background material, would that be used to change the background? I want to lit my scene with an HDRI map, but I want to
put a diferent image in the background, to show on the window( and in that way have the glass in the picture frame reflect that)
3 - It's my first time using IES lights, I've added them using corona lights as you can see but I have this horrible circular glow on the ceiling, any tips to reduce or get rid of that circular glow?
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I think I found the asnwer for my question 3. The lights where upside down, pointing the light to the ceiling, resulting in that hard light being cast there.
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Try stuff for TV albedo put 0.8 instead of 1, and diffus 255 and 240 do not, you have a very bright shining sun on all tests. Bump try not to give up 1.
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Snikon: what do you mean with tv? I think i understood the rest.
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I talked about the panel for tv
Try all of the objects in which the white color instead of level 1 set 0.8 and do not ask 255 and put about 240, wrote above.
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Ok snikon, got it. thanks.
That's no Tv though, it's a computer/display thing ;), but I got what you were saying.
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Lcd panel emits light, so you shouldn't worry about albedo at all :]
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I apologize for my English. I talked about the wall behind the TV
good luck !!!
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No problem snikon