Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] General Discussion => Topic started by: Tweekazoid on 2014-06-05, 17:13:54

Title: noise IBL vs Corona lights
Post by: Tweekazoid on 2014-06-05, 17:13:54

can anyone tell my why there is this big difference in performance between IBL and Corona lights?

When using same number of passes, the IBL approach is noticably more noisy.

Title: Re: noise IBL vs Corona lights
Post by: Ludvik Koutny on 2014-06-05, 17:15:42

Not sure what you mean by IBL...  IBL workflow in corona is simply putting a map in environment slot.

Posting pictures would help a lot.

Title: Re: noise IBL vs Corona lights
Post by: Tweekazoid on 2014-06-05, 18:48:58

image based lighting
so hdri or exr in environment map slot ... exactly as you said


now when I've been rendering images to better describe the "problem" everything seams fine... I think i had checked rendering by time rather than individual passes, so that caused the problem

but still, speed is an issue when using HDRI vs lights

Title: Re: noise IBL vs Corona lights
Post by: Ludvik Koutny on 2014-06-05, 19:17:28

Weird...  when it comes to spherical lights, they can be sampled very well, cause it's an analytic sphere. Not sure if that's your case. Non the less, it should not make THIS much difference. We will have to wait for Keymaster to answer this...

Title: Re: noise IBL vs Corona lights
Post by: Tweekazoid on 2014-06-05, 19:54:51

i can provide the scene max 2014 ... without the model that is