Friday, January 13, 2012

Simple Steps to Create HDR environment in Vray for SketchUp

this is what normal rendering without the use of HDR image to create background environment looks like. Just normal render setting with vraysunlight as the source of light.


I'll show 8 simple step to do a HDRi rendering.


Set the material M for GI Color.

Set it to TexBitmap from the slide down on the left, and choose the material
in File.

the image file must be in .HDR format, usually about 50mb++.
which i'll provide the link for the images later in this tutorial.


set the UVW Type to UVWGenEnvironment, and set the mapping
 type to Spherical.


apply the same settings for BG color's material M.

and because by using HDR image for the light source that are not as intense as
VraySunlight, we have to adjust the shutter speed much slower than previously set.
for this one i set it to 10.0 (400.0 for the previous setting).

and then press RENDER and see the result.




OK HERES THE THING THAT YOU NEED TO KNOW ABOUT THE .HDR THAT IVE BEEN 
USING FOR THIS TUTORIAL.

 the .HDR image should look like this when you opened it up in Photoshop,
usually the image will be in 32bit, which means that you can tweak the exposure of it.
the file size of the image is huge at least 40mb in size .
for this tutorial i use 6000x2900 image 50.7mb in size.

LINKS THAT PROVIDE FREE IMAGE FOR .HDR IMAGES.

10 Free HDRi Spherical Skies Map (this one you have to subscribe to the page in order to access the link to download).

8 comments:

  1. Thanks for this. Best wishes from the Philippines.

    ReplyDelete
  2. This is all pretty simple and i've been doing so every time i used HDRI for GI and Reflections. But i'm still looking for a solution on how to scale down the HRDI.

    I've downloaded some studio HDRIs and want to use them for some studio lighting. The illumination is great, but the scale of the background image is way out of scale. I can't find an option to scale down the 'dome' of the GI. I've tried scaling the model up, but it makes no difference. Now, i dont mind the background being out of scale because i will replace it in Photoshop anyway, but the reflections of the enviroment will also be out of scale and that is the biggest problem. Any ideas on how to fix it?!

    ReplyDelete
  3. i also dont know how to do it too, tried multiply it, the texture try to put some values to the tex repeat

    ReplyDelete
  4. You need to tile the HDRI image to get it to scale

    ReplyDelete
  5. thank you aufi....all the best..

    ReplyDelete
  6. This comment has been removed by a blog administrator.

    ReplyDelete
  7. owh ive accidentally deleted your comment tolsimir,
    one of the reason it appear to be dark is probably you havent adjusted the camera shutter speed

    change it to lower value for example 10 and see what happen

    ReplyDelete

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