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nuhaku

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Posts: 7
Reply with quote  #1 
Hi, 
I really need help for the interior rendering. Since days, I am working on the lighting. But I have always some problems. 
There are shinning on the corner. I have check the model. This is not just thin wall. This was doubled wall. 
I have tried all presets. All lighting system. Lem or without lem. 
Please help me. 
This is a large interior area. But have not window in somewhere in the middle of the model. So the lighting is problem. When I fix the light. Than the shining problem occur. I really don't know, what to do now. And I don't have much time to finish this problem.  

Attached Images
png scene-3-2 2019-04-30 23532600000.png (599.16 KB, 27 views)
png scene-3-2 2019-04-30 23353500000.png (604.11 KB, 16 views)
png scene-3-2 2019-04-30 23070800000.png (612.77 KB, 14 views)
png scene-3-2 2019-04-30 22524300000.png (205.62 KB, 13 views)

nuhaku

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Reply with quote  #2 
I have here 2 high quality renderings. In one of them, the light is very bright and I have no problem with shining on the wall. But in the other one. The lighting looks better but the ceiling shining green. 
I always have this problem. [frown]

Attached Images
png scene-3-2 2019-04-30 03302500000.png (2.22 MB, 19 views)
png scene-3-1 2019-04-29 20165400000.png (2.20 MB, 15 views)

bigstick

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Reply with quote  #3 

We can only help if we know how you have set up the scene. This will include the light type (have you made your own or used one from the Browser) and most importantly - which preset you have used.

We have no ide which presets relate to which images.

We always suggest you turn the information bar at the bottom of images on. this will help you keep track of which presets give which results, and it helps us to diagnose the problem.

We can't help if we don't understand exactly what is happening. You haven't told us much..
 
Making your own lights is tricky. It's too complex to go into in detail now.



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nuhaku

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Reply with quote  #4 
Hi,
Thank you for your response. I have used the interior bright high. 
I have used the lights from browser. 
I just created lem. And that was not so high. Maybe  1 or 2. And in some scene I have deleted the lem. Because it was very bright. I have attached my settings. 
I have a scene. The scene is very long. But I just have the window behind the camera. I have tried to put some lems, where I don't see in the mittle of the area. But it didn't work. 
I tried to make some windows, where I don't see in the mittle of the area. 
When I use just for the spot lights. Some of them looks very good. the spots in the middle of the model are shining to much. And the end of the room is very dark. Even they are the same spots and have same setting. 
I am trying since 2 weeks to create a good quality rendering on this work. But I couldn't get a good one. 
I have used Podium before many time. I have created many good rendering. But the rooms was not so big. And I have windows, some spot and lem. Than it was done. But now. I really don't understand what to do. 
Please help me with this scene/work. I really don't understand why is this happening.

Attached Images
jpeg 11111.jpg (137.58 KB, 15 views)

bigstick

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Reply with quote  #5 
1. Use the .hdr output format and HDR presets
2. Turn the information bar on!
3. Turn the sun/shadows on in SketchUp
4. Use the interior_high_brighter_HDR preset
5. Take out all omni and spot lights that are not part of the Browser fittings
6. The green light on the ceiling is caused by the light reflecting off the green wall. This is what actually happens in real life, but you don't see it as clearly. Renders and photos show it more accurately. It's how global illumination works.
7. Turn the exposure and sun intensity back to the default levels.
8. Use Pie to adjust your lighting in the hdr render

Please post the results.


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davew

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Reply with quote  #6 
If you want to direct sunlight (make show SketchUp shadows are on) into the interior from the windows, adjust the time/ day/ month setting so the sun light is entering the room thru the Window.
A really necessary tool is the Free Solar North that you can install easily from Extension Warehouse.  This will allow you to reposition the north direction so you can adjust the location of the sun.  Typically you want the windows facing East or West to get more sunlight.  You may also want to adjust your Geo Location (located in Model Info in Windows menu) so you can get predicatable sun position.

I have created a short video that shows how to adjust time/ day/ month and use Solar north to position the sun so you get maximum sun light into thru your window.

The Global Illumination in Podium is so good, even a little sunlight will illuminate much of the interior.

nuhaku

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Reply with quote  #7 
Thank you for your response.But my problem is not sun shine. I know how to set the sun shine. 
I have very deep room. And have no window just one and this is very behind the camera. Please see attached rendering. And opposite wall. I have put a lem on the left side, where I don't see. Because the opposite wall was looking very dark. And I have increased the power of the spot light. But what I have is in attached rendering. I don't have a realistic image. This looks very simple. 
My preset was high interior bright. 
How can I solve the problem on the opposite wall.

I have downloaded HDR preset and uploeded them but it give error while rendering it and just took a black scene rendering. 

Attached Images
png elife sahne 3 2019-05-02 19012600000.png (2.35 MB, 12 views)

JustinSlick

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Reply with quote  #8 
Yeah I agree that the color bleed is way too intense.  It's something that does occur in the real world, but global illumination has a tendency to overstate it in some cases. Accent walls shouldn't reflect that much color.

Do you have Photoshop?  If so, I can show you how to target those areas and tone it down in post-processing if you want. (Krita is free and would work just as well, you just need an image editor that allows you to make lasso selections).

The splotches/blemishes on the walls are also a big problem, and are harder to deal with since you're already using the interior high preset. If you worked out a way to light this mostly with LEM lights instead of spotlights, I think they would disappear almost entirely.

You could try the Interior bright QMC preset, which is designed to minimize lighting blemishes.  However that preset puts a lot of noise in the render -- if you try that preset I would suggest rendering at twice the size that you need, as this tends to reduce the amount of noise.

Those splotchy areas are also simple enough that you could lasso select them in post and just add a little bit of blur to clean up the faces.

Here it is with the color bleed toned down and the splotches smoothed out a little:

[Color-revisions] 

I won't go into any more detail if this isn't a useful approach for you, but if you do have questions or anything like that please let me know.

Justin


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nuhaku

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Posts: 7
Reply with quote  #9 
Thank you very much for your response. I also already fix it on Photoshop as you said. 😉
My other question is about the ceiling. Some area very dark some area light. It doesn't look right at all. I guess it is because of the light I have chosen. Do you have an idea to make it more realistic? How would you brighten this area? I have an other scene this is longer.

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jpeg SCENE-2_4.jpg (339.80 KB, 12 views)

bigstick

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Reply with quote  #10 
The ceiling will be fairly dark in a scene like this lit entirely by downlighters, what you are seeing is what they are supposed to do. The ceiling is only illuminated by light bounced from the other surfaces in the room.

Where you have dark areas, these are probably what you would see in real life.

The solution is to use postprocessing on your renders and to use the HDR format and presets.

To illustrate what I mean, this is a photo of my living room, taken this morning:
Lounge.png 
It's an HDR image converted to png.

Look at the size of that window. It's half the width of the wall, possibly slightly more, but look how dark the ceiling and the corner of the room look in the photo.

If you had rendered that, you would complain it was too dark. However - it's correct, because it's real, yet it still subjectively appears too dark.


This is closer to what my eyes tell me I'm looking at:
Lounge2.png

I've adjusted the curves and increased the saturation. This is what I think I'm seeing - but in reality it's fake.

Podium produces images closer to that in the first image, which means you are trying to simulate something which isn't real.

The solution therefore is not to make your render artificially bright, but simulate what is actually there, and then simulate how you perceive it.

Don't try to 'fix' in your render something which you ought to fix with an image editor [smile]


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davew

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Reply with quote  #11 
I think one problem is nuhaku can't use the HDR preset without gettting an error.  The HDR presets do not exist in SU Podium V2.5. 

I have attached two HDR presets. These do work in V2.5 at least for me on Windows.
Make sure you chose the .hdr file format.

Here's the page to explain where to copy these presets to:
http://suplugins.com/podium/preset-downloads.php

 
Attached Files
pps 3_Interior_default_2_HDR.pps (3.53 KB, 3 views)
pps 3_Interior_fine_AA_2_HDR.pps (3.79 KB, 2 views)

nuhaku

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Posts: 7
Reply with quote  #12 
Thank you for your all interest and response.
I will try these presets ASAP. I will also send my model. I understand some darkness and color changes are normal in real world. But my images doesn’t look good. And I want to make them best ASAP.
Thank you again for your time and interest.
nuhaku

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Posts: 7
Reply with quote  #13 
Dear Bigstick,
After I saw your photos, now I understand better. As you said the renderings are actually okay. It is actually the real. Thank you. 
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