Thomo Posted April 10, 2012 Report Posted April 10, 2012 Hi, I have followed the very useful tutorials for HDRI lighting. I am a little confused as to how to treat the rotoscope, refection and refraction. When I use the hdri map, the background and reflections are very dark. The lighting works fine. Should I be converting these back to 16bit in photoshop for backdrop and refections? Should I just use the maps for IBL or also add other lights. Very new to this but I am getting some good results. Many thanks, Greg Quote
Tomas Egger Posted April 10, 2012 Report Posted April 10, 2012 Ola Greg, The interesting way of work is have a High Res .hdri for Rotoscope, RT Reflection and Refractions and use a low resolution (blurred) for lighting, since the GI engine will sample anyway, having a lower resolution will speed up your render. Hope that helps Thanks Tom Quote
Thomo Posted April 10, 2012 Author Report Posted April 10, 2012 Hi Tomas, Thanks for that. I had read about this technique and will try it. What about the darkness of the backdrop and reflections? Am I missing something. Should I be doing something to the HDRI before I use it or is there some setting I adjust? Quote
Tomas Egger Posted April 11, 2012 Report Posted April 11, 2012 Ola Greg, Is it a full spherical .hdri map? please, post to us a render in .jpg format Thanks Tom Quote
Reuben.F Posted April 13, 2012 Report Posted April 13, 2012 Hi, I have followed the very useful tutorials for HDRI lighting. I am a little confused as to how to treat the rotoscope, refection and refraction. When I use the hdri map, the background and reflections are very dark. The lighting works fine. Should I be converting these back to 16bit in photoshop for backdrop and refections? Should I just use the maps for IBL or also add other lights. Very new to this but I am getting some good results. Many thanks, Greg Hi Greg. I think i know the problem, sometimes when using HDRI images they do suffer from under exposure, or look very dark, it seems to happen with the ones from Dosch, the larger backgrounds, you can fix this- In EIAS open "HDRI options" on the special tab (once you have loaded the map), then enable "output remap" and then move the "x range" down to about 1.0 You can tweek this value to preference, hope this helps. Reuben Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.