In this example we show, which parameters can be set to generate appropriate sequences. This tutorial is divided into two sections: The first section describes the parameters, used for generating Trans2k dataset, while the second one describes non-standard setup to generate sequences, containing objects with "glass-like" appearance.
This section describes the parameters, that were used when generating Trans2k dataset. The described parameters can be changed. For those settings, set the parameter render_material="Plastic".
Each transparent profile is defined with 6 parameters: Transmission, Base Color, Alpha, IOR, Clearcoat and Roughness. Additional parameters can be added, but they need to be added in set_plastic_material function. More information on parameters is available here.
{"transparency_profile_1": {"Transmission": value,
"Base Color": value,
"Alpha": value,
"IOR": value,
"Clearcoat": value,
"Roughness": value},
...
"transparency_profile_n": {"Transmission": value,
"Base Color": value,
"Alpha": value,
"IOR": value,
"Clearcoat": value,
"Roughness": value}
}
Parameter profiles then contains transparency profile names, which will be used for rendering:
profiles = ['transparency_profile_1', 'transparency_profile_2']
Level of occlusion is parameterized as the number of non-transparent stripes, rendered in front of the object. Parameter occlusion_types defines the spacing between each stripe and occlusion_names defines the names of the occlusion (more space between the stripes, less occlusion):
occlusion_types = [0.01, 0.02, 0.04]
occlusion_names = ['high_occlusion', 'medium_occlusion', 'low_occlusion']
Parameter blur_intensity_vec defines the level of motion blur, where 0 means no blur and 1 means very high blur.
You can download objects, that were used in Trans2k here. You can add additional object models, only constraint is that is needs to be in the .obj format.
Parameter k defines the length of the rendered sequence. First k backgrounds will be imported to the scene. It is recommended to keep this parameter 50, but not more than 100 (you can increase it if you don't experience memory issues).
One can change other settings in the script (after the line 902). For example, the probability for including distractors can be changed in line 903 and for motion blur in line 973. Description of parameters is available the script. Before rendering it is recommended to view scene with different settings in the debug mode.
If you wish to experiment with different setup, where objects are of different transparent material (advanced settings for material), set the parameter render_material="Glass". Values for this transparent material are already provided in glass_profiles. More information, how to set those values is available in this tutorial.