|Rendering with HDRI plus sunlight|
|Rendering with HDRI allows for more control of the lighting conditions especially during extreme shadows such as dusk and dawn. This method outlines the steps for setting up an HDRI render and controlling the sunlight intensity.|
Turn on the physical camera. set shutter speed to 425, Film speed(ISO) 1oo. Adjust white balance
- Click on the m next to GI and Reflection/Refraction
- Select TexBitmap on the left side in the texture editor first load your HDRI image (you can use a regular image, too), select UVWGenEnvironment and (depending on the type you are using) Spherical . Click OK.
- In order to get the most realistic light calculation you should change your primary engine to irradiance map and the secondary engine to lightcache in the indirect illumination menu. The result looks like this:
- Depending on the brightness of your HDRI you can adjust the intensity of the lighting. Just increase the multiplier values in the environment menu.
- Probably you will have to adjust the camera settings again, too.
- Turn on the ambient occlusion in the indirect illumination manu.
In order to add shadows to your scene you will have to add the Vray sun to get the best result.
- In order to control the intensity of your sun when rendering with HDR images you have to connect the sun to either the Reflection or Refraction in the Environment menu:
- In order to have an illumination that is dominated by the HDRI mapping you have to decrease the intensity of the sun to at least 0.05.
- After connecting the sun to the reflection or refraction option you click ok and uncheck the reflection option again in the environment menu, so your reflections or refractions are coming from your HDRI instead of the Sun system.
- Your result will looks like this. Sun intensity of 0.05 a shutter speed of 100 and an ISO of 100.