Author Topic: Rendering Clear Plastics with Backplate  (Read 394 times)

0 Members and 1 Guest are viewing this topic.

Offline topsecretagent

  • Newbie
  • *
  • Posts: 1
Rendering Clear Plastics with Backplate
« on: December 11, 2018, 09:20:32 pm »
Hello!

Could someone please help explain why clear plastic materials are showing a dark area (on the right side) when using a backplate image? This doesn't happen when rendering on a color background.. adjusting ray bounces does nothing. Global illumination is on.. I can't seem to find any information regarding this issue! Anyone else encountered this?

Any help appreciated!!

Offline kiarash.tamizkar

  • Full Member
  • ***
  • Posts: 170
Re: Rendering Clear Plastics with Backplate
« Reply #1 on: December 13, 2018, 06:20:51 pm »
it is because of thickness of glass and Fresnel effect ,its normal

Offline RRIS

  • Full Member
  • ***
  • Posts: 205
  • Renze Rispens - industrial designer
Re: Rendering Clear Plastics with Backplate
« Reply #2 on: December 17, 2018, 02:25:53 am »
Does it look any different when changing the material to solid glass?

Offline Will Gibbons

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 2825
  • Training Specialist at Luxion
    • KeyShot Training
Re: Rendering Clear Plastics with Backplate
« Reply #3 on: December 18, 2018, 08:04:56 am »
It's because they're reflecting the dark areas in your HDRI (a backplate doesn't get rid of HDRI reflections). You could use this image as the background of your HDRI and then the dark areas would be colored to match your HDRI instead.