Shader eval puts Astra below GLM 5.3 flash on 3D spatial reasoning

teortaxesTex · x · 2026-09-06

A developer's shader-generation eval found Astra underperforming GLM 5.3 flash on what should be its strength, 3D spatial reasoning — prompting the remark "RL does not generalize."

teortaxesTex pushes back: Astra's water shader is mathematically deeper with a higher ceiling, physically integrating foam into wave crests, while GLM applies a trailing white glaze texture; describing issues plus arg tweaks gets perfect water from Astra.

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