Problem: Axis regularity in perlin noise

dilevin / computer-graphics-shader-pipeline

Computer Graphics Assignment about the Shader Pipeline

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Problem: Axis regularity in perlin noise #57

Open andrewq-qiu opened 8 months ago

andrewq-qiu commented 8 months ago

My perlin noise seems to give axis-aligned effects with higher values of $k$ in $perlin(k * vec)$. Is this something else other people are running into? I can't seem to replicate anything similar to the bump examples provided

Here's one of my bump maps where $h = 0.1 perlin(10 s)$ msrdc_0E5tdEe4Ii

wenzhi-guo commented 8 months ago

So if you see "axis-aligned" effects above, it usually means your noise function is not smooth. You mentioned you only see this effect for Perlin Noise with higher frequency?

andrewq-qiu commented 8 months ago

Yes, at lower frequencies it's blobbier but it still has some effects:

This is with $perlin(s)$