interior scene using mr A&D material

[ap3]

Hi there,

 

first time using mr renderer with a&d material, i use the same file with standard material and switch to mr renderer and play around with settings after render completed save image as jpeg format it came out so dark even from original image all material looks slightly darker then scanline render, when save as hdr format its looks normal open with photoshop.

 

can anyone help me to figure it out what is going on there? i use to save all image as jpeg for easy reference when use scanline render no problem at all, please help to figure it out and give comment on this particular issue and the settings for this scene.

 

} daylight system-mr sun/sky

} fg-draft preset/gi-default

} logar expo-b/55 cont/75

} gamma-1.8/input 1.5/output 1.5

} interior lighting-down load from 'erco'

} scene set up-autocad file link to 3ds max

 

image below:

1.scanline render-floor plan

2.scanline render-office lobby

3.first test mr render with a&d mat(darker one behind the glass pane)

4.even worst

5.if select view file image (under preview image) it looks brighter pretty much the effect i want

 

Please give me some feed back, i've been work on this issue 3 days,

need your help!

 

Thanks.

AP

[Tay othman]

Ann Your work is great....!

 

When you are working with metalray exposure control. it will affect the gamma value of your image to ensure realistic simulation of camera,so there is not clipped shadows or blown out highlights.

 

then this data is stored in the exposure of the output image.

 

 

the problem is when saving to JPG its 8 bit/chaneel....So color clipping occurs because jpg is not enough to handle such exposure Data in images.

 

 

So you should render to 16bit tif or 32bit HDR formats this will retain the gamma value

 

and then you can change the overview exposure and add photo-filter for your image in photoshop or other image editing software.dynamically you'll never harm any pixel inside your scene.

[ap3]

Hey Tay,

 

I got sick last week, haven't get chance to reply back.

 

Thanks for your reply, about mr i just a beginner before i start i study & read differ sources & forum, knew that it needs to be patient and take time.

 

you said render to 16 or 32bit hdr format, is this selection under renderer-sampling quality/options/frame buffer type? if this is the case the images submit was using (integer 16 bits per channel) if not can give me a bit more specific on that issue.

 

Thanks.

AP

[Justin Hunt]

The issue is with the saving of the Gamma, you have it set to be the images own gamma, rather set it to system. It will save it with the 1.5 gamma to set in the preferences.

 

Rather save to 16bit .tiff over .jpg. more colour info and not loss of quality. If file size is an issue then try 16bit .png

 

JHV

[Tay othman]

Ann I hope you're getting better....!

I mean when you save renderings to images use HDR or Tiif image files instead of jpg.

 

and when saving tiff or HDR images you'll not worry about the gamma

[ap3]

Oh i see.........!

 

Thanks Justin, let me reset it back.

 

 

Thanks again.

AP

[ap3]

Hi Tay,

 

I'm feeling much better now. got your info will finalize it and post over again.

 

Thanks.

AP