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Tim Anderson avatar image
Tim Anderson asked ·

Replicating the C4D Variation shader to randomise texture placement across cloned objects

I'm trying to assign a texture to cloned objects, randomising the UV offset, scale and rotation for each instance. I can do this with the C4D Variation shader, however I am unable to figure out how to replicate this with Arnold, any guidance would be greatly appreciated.

Here's an example of my use case achieved with C4D's variations shader:

c4dtoatexturerandom
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Peter Horvath avatar image
Peter Horvath answered ·

Here's a simple example scene which reads the index of the clones via a user_data _int shader and generates random vectors from it which drive scale, translate and rotate of a uv_transform shader.

wood_variation.zip


wood-variation.zip (135.2 KiB)
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Thank you so much for the example, Peter. Unfortunately I'm seeing the same co-ordinates repeated across all clones, but I'm attempting to achieve randomisation between each of the clones. Is this possible? This is what I see with your example:

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Seems like the clone indexes are not exported? Are you using an older C4DtoA version maybe?

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