Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Tutorials & Guides => Topic started by: Pikcells on 2020-09-25, 15:23:43

Title: Create A Realistic Wool Rug Using Hair & Fur - 3DSMax & Corona Renderer Tutorial
Post by: Pikcells on 2020-09-25, 15:23:43

Earlier in the year we shared our Swoon CGI roomset and got a lot of feedback asking for a tutorial video to show the process we used to create the wool rug using hair and fur techniques.
It's taken a little time due to our recent workload (customers obviously come first), but here's a video tutorial showing the 3D process in as quick a time as possible.

Page with all the video notes and reference images - https://www.pikcells.com/lab/photorealistic-rug-hair-and-fur-tutorial (https://www.pikcells.com/lab/photorealistic-rug-hair-and-fur-tutorial)

(https://mir-s3-cdn-cf.behance.net/project_modules/2800_opt_1/39571092877105.5e5691b33ba08.jpg)

(https://mir-s3-cdn-cf.behance.net/project_modules/1400_opt_1/9cbce792877105.5e5691b29ca0c.jpg)

(https://mir-s3-cdn-cf.behance.net/project_modules/2800_opt_1/74a3a192877105.5e5691b33b2e5.jpg)

Title: Re: Create A Realistic Wool Rug Using Hair & Fur - 3DSMax & Corona Renderer Tutorial
Post by: jms.lwly on 2020-09-25, 19:24:22

Great stuff! Look forward to following the tutorial through when I have an hour to spare (and probably downloading the model alongside so I have your nice version to use somewhere...).

In the tutorial you use maps to displace the rug geometry, and mention that these are available online - can you share where these are from?

Title: Re: Create A Realistic Wool Rug Using Hair & Fur - 3DSMax & Corona Renderer Tutorial
Post by: cjwidd on 2020-09-27, 05:53:16

I wasn't following this thread before, but can you elaborate on the Swoon CGI roomset, what is this? Is it available online?

Title: Re: Create A Realistic Wool Rug Using Hair & Fur - 3DSMax & Corona Renderer Tutorial
Post by: Pikcells on 2020-09-28, 10:06:00

Our Swoon CGI roomset is here (most of the images are included above) https://www.pikcells.com/portfolio/swoon-furniture-cgi (https://www.pikcells.com/portfolio/swoon-furniture-cgi)

The displacement maps were originally something that we downloaded for free, but I've since discovered the artist has now made them chargeable https://www.turbosquid.com/FullPreview/Index.cfm/ID/902802?referral=LifelikeForms

Title: Re: Create A Realistic Wool Rug Using Hair & Fur - 3DSMax & Corona Renderer Tutorial
Post by: cjwidd on 2021-04-28, 21:59:58

This is probably the most realistic rug I've seen in 3d - I'm happy to see other examples, but to this point I have not. I purchased the project files and studied the implementation quite a bit, and frankly I'm having a hard time replicating the implementation in Ornatrix - not to say it isn't possible or easy.

My main observation is that the 'hair' (threads) are actually little squares, not thin strands as you normally see with a hair / fur system. The shader for the hair / fur is actually just a basic white hair from the Corona Material Library, but somehow the lighting in the scene really drives home the semi-translucent quality of the top layer of carpet.

Apart from the shader, I think the effect that really sells the look of the rug is:
1. subtle displacement to simulate folds
2. manually combing the groom to simulate foot traffic
3. the (sort of) beaded rows of pile that render as small tufts - I don't totally understand how the associated bitmaps are driving this effect.

I'm wondering how generalizable the implementation is to simulate other carpet / rug types.