Rectangular Redshift Light
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Hi,
a long time ago we made this rig to simulate projection ratios in our scenes. For this we used a Standard Spotlight set to rectangular where you can define the aspect ratio of the light and the light angle. We now tried to recreate this rig using Redshift Lights but we cant get it to work properly. Redshift Spots cant be rectangular it seems. Giving it a Rectangular Texture also doesnt work right. Especially as we cant really give it a proper angle that is mathematically correct.
Tldr: Any ideas on how to make a proper rectangular redshift light?
Che[Beamer_Proj_Ratio.zip](Invalid file type. Allowed types are: .png, .jpg, .bmp, .txt, .c4d, .jpeg) ers, Max
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Hi Frischvergiftung,
Here are some examples, adjusted in the Material for the ratio. Yes, it is round, but use the timeslider to go to frame 72.
The Scale and Offset in the Texture node need to be set so that it maps each image to a 1:1 starting point. Vignetting is present, so scale down and offset. Just as each camera lens or projector lens, without framing, would create a circle larger than the sensor or film. The numbers relate to the Lower Left Corner of the image. The Offset is then set to -1 to position that corner of the image in the upper right. Hence, only values between make sense.
The Material holds three Texture Nodes; connect them to see the ratio. Use the time slider to adjust the final size.
https://projectfiles.maxon.net/Cineversity_Forum_Support/2025_PROJECTS_DRS/20250821_CV4_2025_drs_25_RSip_01.zip
You can set presets for the Texture Node; test these carefully with your footage ratios before going into production. The file is just a demo.
All the best
