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The plugin has been updated to 3.37.91, and there are no more errors. Thank you very much for your team’s efforts, you’re doing a great job.

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https://drive.google.com/file/d/16SsEF6cHaqN7Bpi6o1XiZsvPaNwJCEnP/view?usp=sharing

Above is the link to the test model file

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Thank you very much for your proactive improvements. Your team has done a great job. After my initial testing, the material thumbnails work fine after rendering the specified Arnold rendering thumbnails. However, the model thumbnails still don’t work very well. I will conduct more tests later. The testing software is 3ds Max 2025, Arnold 5.7.8.0, and the plugin version is 3.37.90.

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When rendering Arnold material thumbnails, instead of generating sphere thumbnails, flat, solid-color thumbnails are produced. With ‘use custom studio’ enabled, and only an Arnold area light used while specifying Arnold to render the model thumbnail, only a flat black image is generated (using default lights or V-Ray area lights works normally). These issues do not occur when I specify V-Ray as the renderer. The software I used for testing is 3ds Max 2025 with Arnold 5.7.8.0 and 3ds Max 2023 with Arnold 5.7.7.0. The plugin version is 3.37.86.

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Hello, based on my testing, the plugin doesn’t seem very friendly with Arnold. When using thumbnails, specifying the use of the Arnold renderer always fails. Is this the case?