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Judson
Joined: 10 Nov 2005
Posts: 1
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 Posted: Thu Nov 10, 2005 11:34 am Post subject: creating HDR image |
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I am stuck on creating an HDR image from a single 3D MAX panorama rendering.
What I understood is that it takes 5-7 images with different exposure settings to compose a single high definition image.
So, I used 3D Studio MAX to render 5 panoramas (render => panorama) of a stadium interior, altering the exposure settings (render => ENVIRONMENT) each time. I rendered 5 32-bit TARGAs ranging from -2.5 to 2.5, but got the "there is not enough dynamic range for this to be a useful HDR image" message once I tried to build the HDRI in photoshopCS2 (using automate => merge to HDR). Is there another way to alter exposure settings in MAX? Is there a way to alter exposure settings in photoshop (I've tried using image => adjust => exposure)? Is there another way to increase the dynamic range? I've tried everything I can think of...
I stumbled upon a string where a guy took a single raw image and put it through the raw converter 6 times and processed it for different exposure settings, but I have no idea what or where the raw converter is. Can anyone shed some light?
Am I missing something here? Did I misunderstand how HDR was supposed to work or how to assemble it in photoshop? Thanks for any pointers.. |
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swanseamale47
Joined: 23 Nov 2004
Posts: 1478
Location: Swansea UK
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| Posted: Sat Nov 12, 2005 4:11 am Post subject: |
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You cant use a RAW coonverter unless the images are in RAW format. RAW is the unprocessed (not strictly true but close enough) data from a digital camera. Sme models offer the choice of saving as RAW instead of JPEG, the raw contains more information.
I think HDR needs about a 1 stop difference between shots to work properly (I could be wrong) and the ones I have seen being made still needed a fair bit of "tweeking" after to bring out the effect properly, and even then a lot seemed lost when it was converted to jpeg at the end. Wayne |
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