appleseed Users Forum

Blender: Having plane not receive light, only reflections


#1

I stumpled upon this awesome engine as I want caustics in a scene I made. However for compositing I would like to have a plane that does not receive direct light rays but only bounced ones


The image above is what I got so far. I would like the grey plane to be completely black except for the light caused by caustics. How can this be done in blender? :slight_smile:


#2

I figured it out, there is a section called “Visibility” under the “Object” tab. Here “Light” can be disabled :smiley:


#3

Hi @hammy,

Welcome to the Forum!
For complicated caustics you best use Stochastic Progressive Photon Mapping (SPPM) as the lighting engine.
Apart from the ray-type visibility settings for objects appleseed has render layers (AOVs) for indirect diffuse and indirect glossy contributions (see screenshot)

Capture


#4

Do render layers work with SPPM?


#5

Yes, AOV work with SPPM.
Screenshot of a quick low-res (20 samples) SPPM render showing the Indirect Glossy render layer.


#6

I wasn’t sure, that’s good to know, thanks @Mango3.

Something looks wrong with that teapot :slight_smile: