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C4dFreak
15th April 2009, 08:05
A while back I was speaking to RichArt about Hdri images. He told me that you can use your scene to create an Hdri image and use it to cause matching reflections in your scene. I am still not understanding this. When I make a nice scene that has some great reflective materials, I want to show how nice they look, I add a sky object load a Hdri material to the sky object use the composite tag and hide it from the camera, then the materials pop off beautifully. However say I am modeling the inside of a room, now the Hdri images that are in the preset folder have trees, bushes, mountains ect in them so the reflections cast on the materials do not match, in the scene there are not supposed to be reflections of trees in a restroom :blush:.

He said you can make a Hdri Image of the scene you are building and use it to cast the correct reflections. I still have not been able to do this. Can someone here that knows how to do this, please make a video tutorial on this process.

Also I think he said you can do it 2 ways one a regular (square or rectangle) hdri image and one as a Hdri probe by using a mirror sphere in the room and zoom in on this to take a snapshot of your scene, just like the way they make a real hdri probe (hdri ball)..

Again, I am still very confused as to this subject, What I have been doing is to recreate objects in my scene and place them behind the camera so they will cast reflections. I have used reflection planes as shown in your setting up a scene tutorial. I really want to learn how to make the Hdri from a c4d scene.

A video tutorial of this process would be so very helpful. Thanks, Tom

sfBlackfox
15th April 2009, 13:12
I don't get it actually. Normally if you've got enough object textured in your scene, you don't need a hdr image because there's enough in your scene to reflect. Taking a hdr from a scene file would only be interesting if you would want to use it in other scenes.

I think you just need to texture that scene and take out the hdr all along.

Rich_Art
15th April 2009, 19:44
Yes that is right. But if you want to make a HDRI of your scene.. Which part you do not understand?
It is very easy to do.

The only thing you need is a 100% reflective sphere and bake the texture of that sphere to a HDRI image.

Peace,
Rich_Art. :thumbup1: