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Hi,
A new really interesting suggestion... I think...
I usually have to add real pictures for the background, reflection, etc. in combinaison with the VRayPhysicalCamera. The problem with that combinaison the VRayPhysicalCamera cannot isolate some elements, the pictures taken are already exposed and color balance, so we don't want to expose then again within the scene.
This said, the background can easily be left untouch by putting the picture in the 3dsmax environment slot and unchecking the "affect background" option in the render setup. But that's it at the moment.
Actually, I developped my own scripted map based on the "Color Correction Map" that tries to revert the exposure created by the VRayPhysicalCamera. I use it to loading the picture and then put my scripted map in the reflection override map for example. However, this only works with uncompressed image file (not jpeg) and my conversion function is not alway perfect especially because of the white color balance implies in the calculation...
Since VRay 2.0, a beginning of solution has emerged in the VRayLightMtl where you add "compensate for exposure", but this can only be used as a material and not in map slot and doesn't "invert" the white balance of the camera.
Also instead of the simple option "compensate for exposure", I would prefer to have to ability to specify the exact exposure values (f-number, shutter speed and iso) of the picture combined with an option to apply white color balance or not to the map. Then V-Ray could calculate the difference between the actual picture exposure and the one in the VRayPhysicalCamera and affect the picture picture if needed.
For your reference, Maxwell Render has already this kind of map within their rendering engine.
Thanks,
A new really interesting suggestion... I think...
I usually have to add real pictures for the background, reflection, etc. in combinaison with the VRayPhysicalCamera. The problem with that combinaison the VRayPhysicalCamera cannot isolate some elements, the pictures taken are already exposed and color balance, so we don't want to expose then again within the scene.
This said, the background can easily be left untouch by putting the picture in the 3dsmax environment slot and unchecking the "affect background" option in the render setup. But that's it at the moment.
Actually, I developped my own scripted map based on the "Color Correction Map" that tries to revert the exposure created by the VRayPhysicalCamera. I use it to loading the picture and then put my scripted map in the reflection override map for example. However, this only works with uncompressed image file (not jpeg) and my conversion function is not alway perfect especially because of the white color balance implies in the calculation...
Since VRay 2.0, a beginning of solution has emerged in the VRayLightMtl where you add "compensate for exposure", but this can only be used as a material and not in map slot and doesn't "invert" the white balance of the camera.
Also instead of the simple option "compensate for exposure", I would prefer to have to ability to specify the exact exposure values (f-number, shutter speed and iso) of the picture combined with an option to apply white color balance or not to the map. Then V-Ray could calculate the difference between the actual picture exposure and the one in the VRayPhysicalCamera and affect the picture picture if needed.
For your reference, Maxwell Render has already this kind of map within their rendering engine.
Thanks,
