Topics

1

[Max] I need help! / MAXScript Rollout Handler Exception-unknown property: brdf_useRoughness VRayMtl

« on: 2021-07-23, 15:04:01 »

Hello,

I installed Corona 7 on Max2015 today and tried converting Vray2SidedMtl using Corona Converter 2.0 but get that error. How can I solve this issue?

2

[Max] I need help! / Max freezes after rendering

« on: 2021-03-25, 12:37:05 »

Hi,

I had this issue on my old computer with Max2015 a couple of weeks ago and got a new computer last Saturday, installed Max2021, Corona(I downloaded last Sat, think Corona 6 hotfix1) right away and thought no more same issue. But it still freezes after rendering, WTF! I thought first it was due to the old computer but the same thing is happening on a brand new machine.

I check Task Manager and there's no error under Max's status. When there's an error it usually says something like "not responding". Please help and it affects deadline seriously.

3

Hardware / ideal Graphics card for Corona renderer

« on: 2021-03-16, 12:15:25 »

Hi,

I need some advice as to which one of graphics card I should get, Nvidia Geforce RTX or Quadro. I've been using Quadro for many years and my current one is Quadro P2000 which is quite old so am thinking to get a new PC, the following link is a base model.
https://www.dospara.co.jp/5goods_pc/pc_bto.php?h=d&f=d&m=pc&tg=13&mc=9630&sn=4135&vn=1&lf=0

The default graphics card is NVIDIA GeForce RTX 3070 8GB GDDR6. Is it any good for Corona?
I use PC only for rendering and daily browsing, etc, never play any games at all. Is there anything else other than those two you would recommend? Please advise.

4

[Max] I need help! / how to clone a map instead of copy

« on: 2020-09-23, 09:46:49 »

Hello,

I'm following UVW randomizer map tutorial on the following page,
https://coronarenderer.freshdesk.com/support/solutions/articles/12000039642-corona-uvw-randomizer-map

At the brick section how do you clone the Uvw Randomizer map for displacement map instead of making a copy? I usually click and drag to make a copy of a map but not sure if that makes a clone or copy. Please advise.

5

[Max] I need help! / output alpha different from VFB

« on: 2020-03-31, 09:30:19 »

Hi,

I saved EXR and noticed alpha output in Photoshop looks different from Corona VFB. Is it still normal behavior?

I found other thread that in order to get the same results I need to add alpha element in the render setup and save it png but it's too late now, I rendered without it. How can I get proper alpha?

6

[Max] I need help! / Affected by Corona VFB tone mapping in CoronaColorCorrect map

« on: 2020-03-26, 12:03:06 »

Hi,

Can someone please clarify about it? I have the CoronaColorCorrect on top of HDRI map to light an entire daylight scene and keep it unckecked for now. While running IR, I adjust some values in the VFB Tone Mapping and stop it. When I run IR again after moving objects, etc. I get completely different exposure, usually much darker results. If I check it, this won't happen? I currently unchecked the Tone mapping in the VFB.

7

[Max] I need help! / too dark shadow

« on: 2020-02-20, 06:36:47 »

Hi,

Is there any way to brighten dark shadow? The attached render is converted to jpeg but the shadow of the asphalt is much darker in VFB. If I use LUT in VFB it gets even darker. I'm using HDRI, thought about the CoronaRaySwitchMTL but no shadow setting. Please help.

8

[Max] I need help! / excessive firefly

« on: 2020-02-12, 04:27:35 »

Hi,

Could someone help me getting rid of excessive firefly? I think it got worse after turning on the displacement. To fix it, do I need to even lower the reflection value of the black tile material? or/and lower the exposure value of the sun's HDRI? The Denoising helps a little bit but not enough. I ran more than 8 hours.

Passes total : 431
Noise level : 3.92%

Please help.

9

[Max] I need help! / Everything gets over exposed and too bright if turning on Denoising

« on: 2020-01-15, 14:52:49 »

Hi,
If I turn on Denoising it gets over exposed. Is it normal? I tried Intel CPU AI and Corona High Quality.
Please help asap.

10

[Max] I need help! / [solved] Corona camera doesn't update after changing ISO value

« on: 2019-06-05, 18:59:39 »

Hi,

I use the photographic in Corona camera setting. When I change ISO value to brighten it doesn't update its exposure in IR. I tried F-stop, too. Checking Clear VFB between renders on didn't help either. Please help.

11

[Max] I need help! / Not much Bokeh effect and weak DOF

« on: 2018-10-02, 10:10:46 »

Hi,

I enabled DOF, custom Bokeh, and have a camera setting as following,
    focal length : 105mm
    ISO : 25
    F-stop : 1.0
    shutter speed : 1000

The system units is set to mm. The camera is targeting at one of those tables at center. I see some DOF effect close to camera and further down but not much Bokeh effect at all.

Is it supposed to be like that or am I doing something wrong? Please help.

12

[Max] I need help! / [solved] how to render like Vray after making changes

« on: 2018-05-29, 16:55:24 »

Hi,

I started rendering but noticed at some point that I need to make some changes so stopped it. After making changes I wanted to  only region render there but the previous render didn't stay there so I have to combine bunch of two render elements in Photoshop but realized I can't save alpha channel with EXR.

Anyway, is there any way I can region render changes on top of the previous render so that I can output only 1 EXR file? Luckily, I stored current VFB both of them.

I need to send this file tomorrow morning and it's midnight now. Please let me know as soon as possible.

13

[Max] I need help! / standard Omni light conversion

« on: 2018-05-28, 09:30:36 »

Hi,

Does Corona Converter convert the standard Omni light to Corona?

14

[Max] I need help! / visibility of a cylinder object that has a background image assigned

« on: 2018-04-25, 11:22:04 »

Hi,

I'm creating a panorama and ran into an issue. I have a large cylinder object that has an background image assigned and placed a camera at the center of surrounding windows inside the room.

I'm trying to show its reflection to the tree side window(east side in this case) and not to show its visibility at west side since I will add a background image at post. How can I achieve this?

15

[Max] I need help! / Environment override through window

« on: 2018-04-06, 14:35:13 »

Hi,

I have a camera looking outside through window from interior. When I hide the window's glass Environment override works fine but when unhidden it doesn't. Is that normal? The glass object has 10mm thickness. 

I tried Use Corona, Reflection override, Refraction override options, glass material's Visible in masks on and off. None of them worked.