Compositing tag - shadow and reflection catching solutions required


#1

Hello all, I hope you and your loved ones are safe and well.

Using the built in standard renderer, and using an hdri/gi workflow, how can I catch both the shadow and the reflections? It appears when using the compositing tag, I can only catch shadows.

I understand a shadow catcher exists but I am looking to avoid compositing alpha channels in external apps.

Thanks for any help.


#2

Use multipass to output those separate channels


#3

Thank you Troyan. Could you go into a ittle bit more detail please? Like I said, i am looking to just complete the image in the render rather than comp anything together.


#4

Ok, I’m confused what you are trying to do, then. You’re using standard or physical renderer?


#5

You can use a light to create the shadow and a material for reflection …
This uses a HDRI with a compositing tag for the plane.

50%20PM

55%20PM


#6

Thank you vid2k2 but I cannot get the results you do.
Im using standard render
Global Illumination.
Plane with reflective material.
Object that casts shadow and reflection ( similar to your image )
A light to create shadow.
composite tag on plane with your settings ticked.

But all I get is a shadow catch on the plane - not the reflection.

Can you help still? I appreciate your effort.


#7

Hi, That was a while ago, but I’ve recreated it below.

Shadow Reflection.c4d (223.6 KB)