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Thread: Roof Color Difference in Rendering

  1. #1
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    Roof Color Difference in Rendering

    I'm wondering why the render image of my model have a different color of the Roof, which i use the same model i've try to render in revit ray tracer and mental ray. The roof with different color is render in ray tracer and the other one is mental ray. I render the same setting and wait until it will finish the render.

    attach file are the render images.
    Attached Thumbnails Attached Thumbnails Roof Color Difference in Rendering-day-14a-mental-ray-.jpg   Roof Color Difference in Rendering-day-14a-raytracer-.jpg  

  2. #2
    Moderator snowyweston's Avatar
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    Quote Originally Posted by bing1370 View Post
    I'm wondering why the render image of my model have a different color of the Roof, which i use the same model i've try to render in revit ray tracer and mental ray.
    Different rendering engines employ different ways of calculating the interplay of materials and light - all in an effort to rationalise the computational considerations of the real-world physics at play - hence the variance between outputs (as in an Autodesk Cloud render would output a third 'different' result, V-Ray another again, etc...)

    Pick the one that works best for you, or the particular exercise, (the trade-off speed, quality, accuracy, etc) and run with it...

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    Member TheRevitKid's Avatar
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    I agree with snowy... I doubt you will get the two rendering engines to look the same.

    The only way I have ever achieved getting colors to match somewhat between two programs is using an image file for the color instead of the engines RGB settings, etc...

    Here is a post I made about it: All Rendered Colors are NOT Created Equal... In the Cloud... | TheRevitKid.com! - Tutorials, Tips, Products, and Information on all things Revit / BIM

    It's talking about matching cloud and native but the principles are the same.

  4. #4
    Forum Addict sdbrownaia's Avatar
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    The mental ray engine does not correct for gamma correction. so you need to open your materials in photo show and change the levels (gamma correction setting, its the middle box if I remember right in the levels dialog) and change it to .45. this will make your map look very dark but will render correctly in Revit using the Mental Ray. The autodesk ray tracer does correct, so you would have to have two different materials to swap if you wanted to get similiar results.
    cellophane and TheRevitKid like this.

  5. #5
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    thank's for the reply i appreciated so much...
    TheRevitKid likes this.

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