//~custom coord generating~
//and now "ft0.xy" is new coord.
tex ft1 ft0.xy fs1 <2d,nearest,clamp>
When I use custom coord for tex opcode, like above,
that result is always affected by a value of "ft0.z" or "ft0.w" component.
Is this common behavior???
How can I sample a correct value with custom coord?
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