What is wrong with my ceiling?

karllarsen

What is wrong with my ceiling????

SU Pro 2017 Vray 3 (no comments on the interior design please this is just a test render - I downloaded Vray this afternoon).

Any ideas to get me pointed in the right direction will be much appreciated.

cuttingedge

Nothing wrong with ceiling Karllarsen . Looks to me like there's not enough ambient lighting.

proper lighting woule give you much realistic results. Just imagine before you do a rendering Consider these things:

What time of the day is it your trying to portray? .. early morning, afternoon, night?.In your scene, there's the sun coming in from the window into the flooring, but the outside view is dark.
If its a bright day setting , you need not turn on all the lights. luminaires light intensity should be managed

It would be good to start to "override materials" just to test your illumination. Adjust the lighting and uncheck override when youre happy with overall light setup.

You need to go through Chaosgroup basic lighting setup (there are youtube videos)

karllarsen

I've done what you suggested -- no luck; I am having the same annoying ceiling result even of I follow every step in VRAY's tutorials.

One would think that by 2017, someone could come up with a rendering add-on that makes rendering an interior, easy.

I'm not trying to do a 3D Art school project that has to look like a photo - it just has to be a reasonably clean illustration and spending days reading Chaosgroup tutorials/instructions from 2012, is beyond frustrating, and I shouldn't have to write and essay on every spec of my system or every setting in VRAY, just to create a simple lighted interior illustration that doesn't look like an 11-year old did it.

karllarsen

Started from scratch - created box, cut a hole in the side, added a portal light - changed the intensity from 30, to 5000 to 0, no effect on the interior, whatsoever.

And before anyone gets all Einsteinish - YES the light is enabled.

SO there must be a secret switch somewhere, burried in a place that s NOT obvious, that will get the portal light to actually do something?

karllarsen

Added a VRAY infinite plane - applied VRAY grass to the infinite plane -- the infinite plane is unusually rectangular (like 1:4) and the grass is stretched and looks obviously wrong through the hole in the box in the render.

If you view the infinite plane in SketchUp, the material looks like it is supposed to.

Must be my computer, huh...

Win7 Pro SU2017, VRAY 3, i7 980, 24G memory, and Nvidia GTX 980...

filibis

If you could describe why you think the ceiling is 'wrong', that would be better.
For me it looks like you have an omni light on top of table and that causes an unrealistic lit in the middle of the ceiling. If that's the case, try removing it or tweaking its settings.

karllarsen

@filibis said:

If you could describe why you think the ceiling is 'wrong', that would be better.
For me it looks like you have an omni light on top of table and that causes an unrealistic lit in the middle of the ceiling. If that's the case, try removing it or tweaking its settings.

Thanks for your reply, filibis,

What you see on the ceiling is the light from the pendant lights over the island, glaring through the glass cone shaped shades...

I had to crank the lights to get anything to light the interior - to my eyes, the ceiling looks unevenly lit, as if there is NO "global illumination" whatsoever.

Trying to determine HOW to INCREASE global illumination, without a PhD, is mind boggling.

Also, ever try to MAKE a transparent material in VRAY? Try to find the "TRANSPARENCY" adjustment - then TRY to find instructions for how to increase or decrease transparency...

filibis

@karllarsen said:

Added a VRAY infinite plane - applied VRAY grass to the infinite plane -- the infinite plane is unusually rectangular (like 1:4) and the grass is stretched and looks obviously wrong through the hole in the box in the render.

Infinite plane is -as the name implies- infinite. The rectangular shape you see is just a representative shape.

@karllarsen said:

Started from scratch - created box, cut a hole in the side, added a portal light - changed the intensity from 30, to 5000 to 0, no effect on the interior, whatsoever.

You are doing wrong with portal lights. Quoting from the manual that i give below:
"Portal light – Light intensity is determined by the environment behind the light. The Color and Multiplier parameters are ignored."
So basically you'll need a sun and adjust its parameters if necessary.

I highly recommend checking this official manual: https://docs.chaosgroup.com/display/VRAYSKETCHUP (You can use search bar on the left)
There are detailed information for almost everything with examples (such as for Vray Material: https://docs.chaosgroup.com/display/VRAYSKETCHUP/VRay+Material+%7C+VRayBRDF).

And here is an interior lighting tutorial with portal lights: https://docs.chaosgroup.com/display/VRAYSKETCHUP/V-Ray+for+SketchUp+QuickStart+-+Interior+Lighting

karllarsen

Thanks again, filibis,

I also posted on the chaos forum and someone there has helped solve a few issues. All I have remaining now is to figure out why my glass (VRAY glass material), will not let daylight in when I render in CPU mode...

I had to turn the glass off to get this (I dropped a sky background in just to make sure I could still do it):

karllarsen

Still need to figure out how to get alpha to work behind window glass...