Trying to nail down the LEGO material

Use this forum for general user support and related questions.
Forum rules
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
Post Reply
User avatar
Lights_and_Shadows
Posts: 47
Joined: Thu Jan 18, 2018 3:40 pm
Location: United States

Trying to nail down the LEGO material

Post by Lights_and_Shadows » Sat May 23, 2020 10:57 pm

Hey folks, been a while :)

Still tackling my long-running LEGO passion project lol. idk if some settings were adjusted between updates in the past few months, but I for the life of me cannot seem to nail down a proper SSS effect for the bricks. Really noticed it when making the light blue (or Maersk blue) color. My version is lighter than the photo reference I am using here:
Swooshable Flickr photostream sample

Swooshable also provides RGB hexadecimal values for the colors, which I am using.

My version:
luxcore_lego_test.png
Node setup:
luxcore_nodes.png
Windows 7 Professional, x64
Intel Core i7 6700K, 4GHz
EVGA GeForce GT740 Superclocked, 4GB GDDR5
32GB RAM DDR4 (approx. 80GB with pagefile active)
RAID 0 configured HDD setup (2x 500GB Seagate Barracudas)

User avatar
Lights_and_Shadows
Posts: 47
Joined: Thu Jan 18, 2018 3:40 pm
Location: United States

Re: Trying to nail down the LEGO material

Post by Lights_and_Shadows » Sun May 31, 2020 11:55 pm

I figured out what I was trying to do, thanks to Sharly's tutorial from 2.79. Works wonderfully. :)
Windows 7 Professional, x64
Intel Core i7 6700K, 4GHz
EVGA GeForce GT740 Superclocked, 4GB GDDR5
32GB RAM DDR4 (approx. 80GB with pagefile active)
RAID 0 configured HDD setup (2x 500GB Seagate Barracudas)

User avatar
Lights_and_Shadows
Posts: 47
Joined: Thu Jan 18, 2018 3:40 pm
Location: United States

Re: Trying to nail down the LEGO material

Post by Lights_and_Shadows » Sun Jul 05, 2020 4:51 pm

Alright, this is more for those specialty materials that were found only in Bionicle sets. These were quasi-metallic -- more of just the regular AB plastic with a metallic paint applied, but I found a few that have more than one color in their reflections, so-called "flip flop" colors. Is there a way to have a material change color based on viewing angle or so I have to settle with a close guess?

One such example, pulled from Ryan Howerter's Flickr feed (a great resource for those who are also interested in this, check it out :D)
Screenshot_2.png
In Cycles this could be done using the Fresnel node as the mix factor for combining two materials, but idk if Luxcore has a similar function (planned or otherwise)
Windows 7 Professional, x64
Intel Core i7 6700K, 4GHz
EVGA GeForce GT740 Superclocked, 4GB GDDR5
32GB RAM DDR4 (approx. 80GB with pagefile active)
RAID 0 configured HDD setup (2x 500GB Seagate Barracudas)

User avatar
Sharlybg
Donor
Posts: 2485
Joined: Mon Dec 04, 2017 10:11 pm
Location: Ivory Coast

Re: Trying to nail down the LEGO material

Post by Sharlybg » Sun Jul 05, 2020 5:43 pm

Try to experiment with absorption color in luxcore shader node. It can change color depending of the view angle. i use this effect for my carpaint tut here :

https://youtu.be/KFbk_JxPUj4
Support LuxCoreRender project with salts and bounties

Portfolio : https://www.behance.net/DRAVIA

User avatar
Lights_and_Shadows
Posts: 47
Joined: Thu Jan 18, 2018 3:40 pm
Location: United States

Re: Trying to nail down the LEGO material

Post by Lights_and_Shadows » Mon Jul 06, 2020 5:02 am

Sharlybg wrote:
Sun Jul 05, 2020 5:43 pm
Try to experiment with absorption color in luxcore shader node. It can change color depending of the view angle. i use this effect for my carpaint tut here :

https://youtu.be/KFbk_JxPUj4
That did the trick. Thanks, Sharly! :D That just earned you another like on that vid
Windows 7 Professional, x64
Intel Core i7 6700K, 4GHz
EVGA GeForce GT740 Superclocked, 4GB GDDR5
32GB RAM DDR4 (approx. 80GB with pagefile active)
RAID 0 configured HDD setup (2x 500GB Seagate Barracudas)

User avatar
Sharlybg
Donor
Posts: 2485
Joined: Mon Dec 04, 2017 10:11 pm
Location: Ivory Coast

Re: Trying to nail down the LEGO material

Post by Sharlybg » Mon Jul 06, 2020 9:37 am

That did the trick. Thanks, Sharly! :D That just earned you another like on that vid
Happy that it help you ;)
Support LuxCoreRender project with salts and bounties

Portfolio : https://www.behance.net/DRAVIA

Post Reply