Fast Preview Render

[VadoZe]

I need sometime some preview renders)
Tried to search some answer here, but didn't found...

E.g. in VRay i could tune settings and achieve pics aprox the same quality, but slightly blurry and maybe noisy (depends on scene complexity) and it'll take 10-30min/pic 1080p on my 3770K 3,5GHz!
Corona's pics are great,but in 5-15mins still are noisy( i'm new in it but avoid Emission Mats, Huge Displace/Bump, Albedo 1, etc.)!
Maybe there are some settings in Corona to achieve pics in 10-20mins maybe less photographic/supadupa-realistic/amazing/caustic/dof/beauty but no noise? or special tracing method? or settings I didn't noticed? or...not enough beer in me?)

btw. now I use Alpha5 (not daily build).

[Ondra]

hm... if noisy previews are not ok for you, but blurry ones are, I suggest waiting for the next stable release that will have irradiance caching in it

[Ludvik Koutny]

There is not irradiance cache in corona at the moment, so this will probably not be easy. You should really post some pictures as it will make detecting noise source a lot easier.

[racoonart]

hm... if noisy previews are not ok for you, but blurry ones are, I suggest waiting for the next stable release that will have irradiance caching in it

Why that? I thought this was something you were dismissing some Alphas ago.

[VadoZe]

Post as it is, maybe some gamma settings need to be set, but they become darker!
GammaAndLut 1.8, all render settings are default, only use PT+HD, HD(as recommended PTsamples-512, MaxRecords-300). Plus VRay pic - and another question: why in Corona, reflections become dimmer!

6*CoronaLights - Intensity 1000, Sphere R9mm, and WM screen: Emission 1,6 +Map!
VRayPhysicalCamera+CoronaCameraMod

[Ondra]

hm... if noisy previews are not ok for you, but blurry ones are, I suggest waiting for the next stable release that will have irradiance caching in it

Why that? I thought this was something you were dismissing some Alphas ago.

Because it will come back being better than ever before :D

[maru]

E.g. in VRay i could tune settings and achieve pics aprox the same quality, but slightly blurry and maybe noisy (depends on scene complexity) and it'll take 10-30min/pic 1080p on my 3770K 3,5GHz!

You can try rendering with low amount of path tracing samples (2-8) and unlimited passes or set passes to 1 and use high path tracing samples amount like 2000 or so.

Because it will come back being better than ever before :D

Can't wait!

[VadoZe]

...will have irradiance caching in it

It's like IrMap in Vray? So cache could be use the same way in animations(using info from previous renders)?

[Ondra]

yes.

It was already implemented in previous version, but was later dropped because it require one feature for efficient sampling that complicated the rest of the renderer too much. But now I have a better idea that does not need that feature ;)

[VadoZe]

But it'll be always biased? (when using IrCache)

[Ondra]

yes, you would need unlimited memory for unbiased rendering with IC/HD cache/lightcache

[lacilaci]

hm... if noisy previews are not ok for you, but blurry ones are, I suggest waiting for the next stable release that will have irradiance caching in it

And now I ain't going to sleep until i see this release :( :D this will be sooo awesome...