blender/blender-manual
23
23
Fork 104
Code Issues 76 Pull Requests 7 Projects 1 Releases Wiki Activity

Add notes about Ray Portal BSDF quirks #104807

Merged
Brecht Van Lommel merged 3 commits from Alaska/blender-manual:portal-notes into main 2024-06-04 17:06:07 +02:00
Conversation 3 Commits 3 Files Changed 1 +8
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files
Showing only changes of commit 9fcfd2e076 - Show all commits

8
manual/render/shader_nodes/shader/ray_portal.rst
View File

@ -15,6 +15,14 @@ render passes are passed through,
and it is affected by light path max transparent bounces. and it is affected by light path max transparent bounces.
.. note::
- The portal only allows rays to pass through in one direction.
Alaska marked this conversation as resolved Outdated
Brecht Van Lommel commented 2024-06-04 16:06:06 +02:00
Outdated
Review
Copy Link

I would add:

Add a second portal at the target location to make rays go in the other direction as well.

I would add: > Add a second portal at the target location to make rays go in the other direction as well.
- Some of the techniques Cycles uses to reduce noise does not work through portals.
Alaska marked this conversation as resolved Outdated
Brecht Van Lommel commented 2024-06-04 16:08:26 +02:00
Outdated
Review
Copy Link

I suggest:

Light sampling does not work efficiently through portals. This can lead to increased noised from lights on the other side of portals. Particularly small lights may be very noisy, or not pass through at all.

I suggest: > Light sampling does not work efficiently through portals. This can lead to increased noised from lights on the other side of portals. Particularly small lights may be very noisy, or not pass through at all.
This leads to issues like increased noise from lights passing through portals,
or if the light is small, it's light may not pass through the portal.
Inputs Inputs
====== ======