topic Re: Corona Material settings to Arnold equivalent in 3DS Max 2020 in Arnold General Rendering Forum

Corona Material settings to Arnold equivalent in 3DS Max 2020

Anonymous — Thu, 02 Jul 2020 09:03:32 GMT

Hi there!

Can you help me find the equivalent settings in Arnold for this Corona settings?

I'm Virtual Staging a space and i've been following this great tutorial but no i'm stuck.

https://www.youtube.com/watch?v=ck0BHKY2brc

We're supposed to connect a Bitmap to Corona Tone Mapper Control to Corona Shadow Catcher Material.

The purpose of this is not to affect the background color, but to get the interior environment into the scene.

Can you please help me with this?

Thank you

Pedro Ferreira

Re: Corona Material settings to Arnold equivalent in 3DS Max 2020

lee_griggs — Thu, 02 Jul 2020 09:17:28 GMT

Have you tried the shadow_matte shader?

Re: Corona Material settings to Arnold equivalent in 3DS Max 2020

Anonymous — Thu, 02 Jul 2020 12:38:01 GMT

yes. but the problem is controlling the different properties as explained in the video ... idoon't get the same results.

do you know how to do it?

Thanks

Re: Corona Material settings to Arnold equivalent in 3DS Max 2020

lee_griggs — Thu, 02 Jul 2020 12:42:35 GMT

Which properties? time stamps? I don't have 15 minutes to waste watching this video.

Re: Corona Material settings to Arnold equivalent in 3DS Max 2020

CiroCardoso3v — Thu, 02 Jul 2020 12:51:20 GMT

What this node does in Corona is making that particular image not being affected by tonemapping, any LUT you have on your framebuffer and exposure. This is a technique for you to bring a background into your scene and comp it together.

I don't believe you have such a node in Arnold. Timestamp is around minute 12.

Try the Ray Switch.

Re: Corona Material settings to Arnold equivalent in 3DS Max 2020

Anonymous — Thu, 02 Jul 2020 14:45:05 GMT

Thanks.

I will try

Re: Corona Material settings to Arnold equivalent in 3DS Max 2020

Anonymous — Thu, 02 Jul 2020 15:17:22 GMT

i just can't do it. don't have the knowlegdge

Re: Corona Material settings to Arnold equivalent in 3DS Max 2020

lee_griggs — Thu, 02 Jul 2020 15:23:43 GMT

Have you read the user-guide about it? What don't you understand about it?

Re: Corona Material settings to Arnold equivalent in 3DS Max 2020

Anonymous — Thu, 02 Jul 2020 17:35:49 GMT

Thank YOU, Lee!

I've made it!!

It's working!

Re: Corona Material settings to Arnold equivalent in 3DS Max 2020

madsd — Thu, 02 Jul 2020 22:24:16 GMT

Since the default grading in max is so simple, it consists of an exposure, and low,mid and high, we can write an OSL shader that listens to these values and phaze out the exposure, low,mid and high when the user works with the general exposure and grading tools, found in the physical exposure mode.

This does it for Coronas Tonemap node.

Scripted controller to

SceneExposureControl.exposureControl.highlights = 0.5

SceneExposureControl.exposureControl.midtones = 0.1

SceneExposureControl.exposureControl.shadows = 0

Being caught by OSL float inputs that gets massaged into an exposure, low, mid, high equation that is syncing up, so when you push the values around in the exposure panel, the map connected to this OSL tonemap will remain completely still in terms of grading.