AnsweredAssumed Answered

Small object with emission (lightbulb filament for exemple) material doesn't render properly ?

Question asked by rems7581 on Nov 10, 2018
Latest reply on Nov 14, 2018 by bsavery

Hi everyones !


I'm trying to model a lightbulb with RPR, following an amazing Blender Guru tutorial (thanks by the way). But the tutorial is made with Cycle.

As RPR is way more faster than cycle on my 2016 Macbook Pro 15 (Radeon Pro 450), i'm trying to transpose it from Cycle to RPR.


But I can't make the emission material filament light render correctly, all I can see is noisy white dots. Blender Guru tell us how to fix the in Cycle (Beginner Blender Modelling Tutorial - Lightbulb Part 2 of 2 - YouTube) : the glass material of the bulb generates caustics that don't render correctly, he fixes that issue telling Cycle the glass does not intercept light.


So, the noisy white dots issue is present in RPR, but I can fix it. I've tried :

- Increase light strength of the filament : not working

- Hide the glass bulb : not working

- Move the filament to side outside the glass bulb : not working

- Scaling up the filament : WORKING !


So here is the question : how to render small emission object like my filament in RPR ? Thanks for advance... Rémi from France (sorry my bad english...).


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