Hi panzer_k,
if you would have really hight quality renders working with caustics and IOR, then PMC kernel is definitely the right choise (PMC_test-file.orbx).
Keep in mind it is slower than Path tracing kernel.
Using Path tracing Kernel (PT_test-file.orbx), you will use powerful tools like Adapting sampling (screenshot 01.jpg) and Ai Denoiser (
viewtopic.php?f=27&t=67819&p=339971&hilit=denoise#p339941) tools.
they will dramatically reduce the rendering time
Use Octane metallic shader, it will allow you to use complex ior + GGX BRDF model; here (
viewtopic.php?f=21&t=67519) some metallic shaders to dowload.
Use HDRI with a good High Dynamic Range, and start setting gamma 1 in Octane RGB image slot.
Do not use specular 1 and roughness 0 materials, but specular 0.99 and roughness 0.01.
If needed you can use an HDRI texture to light your scene and differents RGB images or HRDIs texture for reflections/refraction (screenshot 02.jpg)
Regards
Paride