OTOY Forums

Hi any of you know a way of having a material opacity be determined based on if its being lit or not, similar to c4d's backlight effect shader. usage example: if i have an earth scene and want the city light texture only to show in the dark. Any help is very appreciated!

The Planetary environment seems to do something like that by default (showing the city lights texture when the camera is turned away from the sun). It would be great if whatever magic used to achieve that was exposed to the shaders as well!

The below link demos an incredibly detailed 3D Earth project done in Nuke. The artist / compositor who made it discusses the Daytime / Nighttime transitioning, which is done with scripting.

https://compozitive.com/3d-earth-in-nuk ... -textures/

I too would love to know if something similar can be done in Octane (maybe with OSL?).

Yes im currently stuck with terragen and it certainly is the way to go for this sort of thing but the render times are stupid and i have somewhat managed to make now a shader in c4d octane for the atmosphere with that same nice falloff u can achieve in terragen. It seems like such a lost opportunity with the planetary env. feature of octane. Such huge potential on that, just by for example allowing the user to add multiple layers of whatever material ud like as in for example clouds ....also applying simple settings for the atmosphere just as changing color brightness, haze .. etc. I dont understand why something like this hasnt been added yet. for now ill use terragen and read up on osl scripts.