Upbge 0.3 Shader editor procedural textures

What is the cost of textures using not only bitmaps but procedural and other nodes ?
Is the shader evaluated only at game start ? or each frame ?
Does it has an advantage Memory Vs loading times ?

shaders are compiled once at start, and that code is run on every pixel on every frame rendered.

procedural textures should have a lower memory footprint since its just a math fomula, where as images need a specific data set to be saved.

i do not know if gpu texture compression is supported (dds)

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