Corona Renderer Forum

General Category => Gallery => Topic started by: Marcus on 2013-10-09, 10:52:35

Title: Holiday House Switzerland
Post by: Marcus on 2013-10-09, 10:52:35
Hey Hey,

I'm Marcus. I heard from Corona Renderer a few months ago. Finally I had some time to work with it.
I'm astonished how easily Corona is to manage in the first try.
So I'm really think about to implement Corona in my Commercial-Workflow. It's really nice to show a client the overall mood of an image in 5 Minutes. Wow.

PS: All images are lit by a single HDRI. Also I've place a big self-illuminated panorama around the scene so get some better specular reflection.
The rendertimes vary about 1,5 and 2,5 hours with a single i7

Marcus




Title: Re: Holiday House Switzerland
Post by: st.germain on 2013-10-09, 14:57:12
very good! can you describe more the "self-illuminated panorama" (screenshot). did you use it as a override material in environment?
Title: Re: Holiday House Switzerland
Post by: Marcus on 2013-10-09, 15:29:36
St. Germain I just put a cylinder around my scene an give it a self-illumination (emission) material with the mountain panorama as emission-map. I used a low value about 5-10 for the shots. I don't use material override, but a HDRI in the environment.

Marcus

Title: Re: Holiday House Switzerland
Post by: st.germain on 2013-10-09, 15:33:47
thanks a lot!  very usefull :)
Title: Re: Holiday House Switzerland
Post by: Ondra on 2013-10-09, 15:38:14
hm, that looks like a really inefficient process, you should just use environment overrides and/or constantMtl for that
Title: Re: Holiday House Switzerland
Post by: Marcus on 2013-10-09, 15:41:20
I thought so. ;)

I wanted to combine the lighting of the HDRI and the specular reflections of the background. Is there another way to do this?
Title: Re: Holiday House Switzerland
Post by: Ondra on 2013-10-09, 15:46:32
yes, just put the map into reflection BG override, but never create backplates enveloping the entire scene
Title: Re: Holiday House Switzerland
Post by: Marcus on 2013-10-09, 15:51:18
ups... don't saw this section. ;)
Merci
Title: Re: Holiday House Switzerland
Post by: Ludvik Koutny on 2013-10-09, 16:50:24
ups... don't saw this section. ;)
Merci

Actually, you can envelope entire scene... Just do not use it to illuminate scene. You can have exactly what you have now, just use CoronaConstantMTL, instead of emissive CoronaMTL. It will give you some performance boost.

To be honest, Keymaster misunderstood the difference between environment map and background plates...

CoronaConstantMTL is material exactly for this purpose. Common workflow is to first light your scene with daylight or HDRI, and then put geometry behind windows and ConstantMTL on it. ConstantMTL is optimized to affect scene lighting as little as possible, while still provide directly visible background as well as reflections.
Title: Re: Holiday House Switzerland
Post by: Ondra on 2013-10-09, 16:55:16
no, but it depends if you have the environment as an enviro map or single view (plate). In any case, modelled enviro with material other than constantMtl is MUCH slower than enviro with constant mtl, which is in turn slightly slower than background override.

Of course if you have single view enviro, you must use a plate with constantMtl
Title: Re: Holiday House Switzerland
Post by: Ludvik Koutny on 2013-10-09, 17:04:54
Ok, we are a bit confusing now, so i will try to wrap it up on what we have agreed with Keymaster:

There are 3 ways of doing background:

Geometry around the scene with CoronaMTL and enabled emission - VERY SLOW - Do not use

Geometry around the scene with ConstantMTL - FAST

Map in environment override slot - SLIGHTLY FASTER than ConstantMTL, but your map has to be spherical environment map, so photo or tiled photo wont do.

I hope this now makes sense...
Title: Re: Holiday House Switzerland
Post by: Marcus on 2013-10-09, 17:58:57
Thank you for the great input. I'll keep that in mind.
Seems to be a nice and active community.

Title: Re: Holiday House Switzerland
Post by: RolandB on 2013-11-20, 09:53:56
Thanks a lot for these precisions about the environment, it helps a lot !
And congrats for those great renders
Title: Re: Holiday House Switzerland
Post by: teknikarsitek on 2013-11-20, 15:28:40
Ok, we are a bit confusing now, so i will try to wrap it up on what we have agreed with Keymaster:

There are 3 ways of doing background:

Geometry around the scene with CoronaMTL and enabled emission - VERY SLOW - Do not use

Geometry around the scene with ConstantMTL - FAST

Map in environment override slot - SLIGHTLY FASTER than ConstantMTL, but your map has to be spherical environment map, so photo or tiled photo wont do.

I hope this now makes sense...

Rawalanche, may i ask you, regarding those 3 items u mentioned, ConstantMTL <- how to use this? is it dragged to the background slot, i tried but cannot .. also into the corona render setting on the environment tab, cannot dragged into that.
Title: Re: Holiday House Switzerland
Post by: skinny_santa on 2013-11-21, 09:16:59
that psychedelic wood is sucking me in @___@