Additive / Shellac mode for corona layered material ...

Corona Corona for 3ds Max Feature Requests
1

+1
I was really happy to finally get the layered material with 1.3 but i was a little bit dissapointed as i saw that i can’t switch to additive mode.
Please add this feature because this is really essential for automotive artists like me. I know it’s a fake function but the workflow i’m using requires an additive mode.

I’ve attached an render which i did with vray and it shows my technique of doing procedural flakes with additive blendmtl. I already tried the same approach in Corona but unsuccessfully..

DA_flakes_2.jpg
DA_flakes_2.jpg1920×1080 365 KB

2

nope, not adding unphysical modes. There should be a reasonable way to do it physically

3

How to do the car coating materials and other lacquered materials?

2015-honda-civic-small-car-best-buy-05-600-001.jpg
2015-honda-civic-small-car-best-buy-05-600-001.jpg600×450 62.9 KB

4

Look for official car paint tutorial here: Renderer for architectural visualization - Corona | Chaos

5

This looks like carpaint, yes, but this is not a transparent material with another glossiness upon the base layer.
Carpaint is the special case of it.

shellac.jpg
shellac.jpg800×800 69.6 KB

6

If you’re here for a believable looking picture, then feel free to take whatever shortcuts and cheats you can - as long as result is great, nobody will care how it’s achieved. OTOH, if you’re looking for scientifically acurate material recreation, i’m affraid i can’t help you here. I know that there are renderers that claims their materials are constructed in “physically correct” manner, but for me added complexity just not worth arguably marginal improvement in image believableness :]

7

Hi, I tried my best. :smiley:
Is it close?
Sorry for the patterned flakes.

shel2.jpg
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shel3.jpg
shel3.jpg800×600 112 KB

a1.jpg
a1.jpg800×600 42.7 KB

a2.jpg
a2.jpg800×600 116 KB

a3.jpg
a3.jpg800×600 65.3 KB

8

How? Tell, please. This is exaclty what i need.

9

Basically carpaint tutorial mentioned before. Scenes in Max14 attached.
(update: added maps)
shellac2-14.max (240 KB)
additive02-14.max (12.3 MB)
CARPAINT-SAMPLE.zip (588 KB)

10

Hmmm, awesome trick! Blend with mirror, not with glass. Thanks! I will try to use it.

11

Why would you want to use glass here? Generally blending refractive materials is not a good idea.

I advise to take a look at our helpdesk articles from time to time. :wink:
https://coronarenderer.freshdesk.com/support/solutions/articles/5000516191

12

That is because i have a piece of material. There is a thin layer of polish upon wood. So i decided to do it with glass.

13

When you are blending two or more materials, and one of them is refractive, the overall result will also get refractive (transparent).

14

Thanks, i keep it in mind. That is why we want a shellac mode ))

Another (brute-force) way is to do a copy of geometry in the same place with shell modifier and glass material.