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KeyShot allows you to adjust your HDRI lighting through a set of easily adjustable Settings found in the Project window, Environment tab.
Load a lighting environment from a file (.hdri, .hdz, .exr). Select the icon to open a new environment. Select the icon to reload the current environment. Hovering over the file name will display the file path. Right-click to display options to Copy Path, Show in Explorer, Reload or Open a new environment file.
- Brightness brightens or darkens the entire HDRI from the shadows to the highlights equally.
- Contrast increases the separation between dark and bright areas, making shadows darker and highlights lighter.
- Size determines the size of the environment.
- Height sets the vertical position of the environment in relation to the ground plane.
- Rotation allows you to rotate the environment.
- Lighting Environment uses the image of the lighting environment as background in the scene. The hotkey E will activate the Lighting Environment as background.
- Color allows you choose a solid color for the background. The hotkey C will activate the Color background.
- Backplate Image allows you add and use an image as the background for the scene. Supported file formats include .jpg, .jpeg, .tif, .tiff, .bmp, .png, .gif, .dds, .hdr, .hdz, .exr, .tga, .ppm, .ktx, .psd. The hotkey B will activate the Backplate Image, If none is set, you will see a browser where you can select an image.
The background Color may also be set to a solid color through the Photographic Image Style, this will override any settings applied in the Environment tab. But the Environment background will still impact the shadows.
- Ground Shadows is an option to change the visibility of ground shadows and allows you to set the base color.
- Occlusion Ground Shadows is an option to see occlusion shadows in place of drop shadows.
- Ground Reflections is an option to change the visibility of ground reflections.
- Flatten Ground will project the part of the environment that is below the ground onto the ground plane, correlating height and width if the lighting environment is visible as the background in the scene. The hotkey G will toggle the Flatten Ground option.
- Ground size allows you to set the size of the virtual ground plane and only effects the ground shadows.