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Anonymous at Wed, 21 Aug 2024 13:32:54 UTC No. 992567
Maybe not strictly 3d question but certainly adjacent to 3dcg. Can anyone with knowledge of Substance Designer explain why blending together (with Subtract mode) of Linear Gradient passed through Transformation 2D and Curve creates a shape like this? How this works, what actually happens? This result just seems like magic and I really wanted to understand the "math" behind this.
Anonymous at Wed, 21 Aug 2024 13:56:40 UTC No. 992571
>>992567
Think of White as 1 and Black as 0 and it makes sense. You are subtracting the upper gradient from the lower one, which means on the right you're subtracting very little (=black) and on the left you're subtracting a lot (=white).
Because the lower gradient isn't all that bright to begin with, you reach zero pretty fast going from right to left (negative numbers = black), and the darker the lower gradient, the faster you reach it. Histogram just sets a threshold and treats everything lower as strictly 0 and anything higher as strictly 1.
Anonymous at Wed, 21 Aug 2024 15:15:11 UTC No. 992572
>>992571
Thanks, this makes sense. Feels like a bit of a roundabout way to define shapes though.
Anonymous at Thu, 22 Aug 2024 16:39:29 UTC No. 992627
>>992625
Cool stuff anon. Substance Designer is a deep rabbit hole.