daveb867

aj post the render, it sounds interesting

AJLynn

Okay. It's kind of quick and WIP and sorry for the blur but you get the idea.

Attached Images

section.jpg (178.6 KB, 44 views)

daveb867

thats really really good mate, congrats,

but what is the blur hiding????

and any hints or tips on how the interior/exterior lighting setups were

i can never get my photometric lights to look like that


(going back to my original problem - does the fact the light portals are behind glass have much effect on how blown out it will be "reflections maybe?)

AJLynn

The blur is hiding some identifying markings, of course - you're not supposed to know exactly what it is.

The lighting setup was... hang on, maybe I still have this in a file I can find... damn, this is so crude it's actually embarrassing...

The sun has a multiplier of 0.03, sky is 0.05, camera is target with clipping and there's exposure control with EV=9. The track lights are from the internet, ERCO.73200.023.142 with the corresponding IES file and in Light Lister their dimmer is at 1200.

The sun has photon targeting turned on and its GI Photons are set to 100 under the mental ray Indirect Illumination tab. GI is turned on and the average photons per light is 1500. FG is set to draft with multiplier at 1.5 and there are sky portals with default settings.

All the materials are A&D and most have some kind of glossy reflection.

Basically I'm throwing more of my computer's time at the problem than my own - I figure I could have optimized it more but I didn't feel like it.

daveb867

ok but if your sun and sky settings are soooo low, then how does the exterior look so sunny?

and also how does the render look so crisp when you only have a draft setting for fg???

AJLynn

When you use GI+FG you don't need your settings for either to be so high. And the exterior looks sunny because those are the sun/sky settings appropriate to my camera's exposure - basically I had perviously done another render in the interior where the sun/sky were at 1.0 (the outside was blown out but that was ok) and I had made the adjustments in the exposure control and interior light dimmers to get everything looking nice. Then when I wanted the section (this is design process stuff, in an architecture firm, and it was an impromptu thing) I adjusted the sun to balance it to the interior lights then made some tweaks in the exposure settings, and Photoshopped the levels to make it what I wanted. In the Photoshop file the top layer is Levels set to 5/1.2/235.

I did say it was crude...

daveb867

problem with zap's solution to my initial question

when you change the transparency colour, you still can't see the environment through the sky portal, it is now just black ?? i have a panoramic bitmap in my environement slot but nothing is showing. The blown out effect is fixed however so and

and aj it maybe crude, but these are tips that help people like me out when we struggle for ages to get the result that i want, we may not think to do it like that although it works for what we want

Justin Hunt

sounds like you have turned the transparency down too much.

Here is a basic test , two portals one with transparency one without, mrsun and sky, photographic exposure @ ev 12 , GI and FG

Portal transparency colour value @ 1 (white), 0.5 (grey) and 0 (black) and last one has a pink colour

Notice how the light doesnt change, only the intensity of the mrphysical sky.
Notice how the pink tinted the sky but not the lighting
Notice that the portal lights dont quite fit in the window (Im lazy) and how the sky "outside" the portal is still blown out

jhv

Attached Images

	Skyportal 1 Transparency.jpg (92.9 KB, 11 views)
	Skyportal 0.5 Transparency.jpg (96.3 KB, 16 views)
	Skyportal 0 Transparency.jpg (90.4 KB, 10 views)
	Skyportal PinkTransparency.jpg (97.9 KB, 11 views)

Attached Files

Portal Transparecy.zip (23.3 KB, 4 views)

siliconbauhaus

zap should add that tip to his blog

Justin Hunt

It was mentioned on my mentalray.com as well

jhv