How do I point sample a env map with an environment call? I thought it would be 
something like

// Initialize texture options for point sampling
gTexOpts.nchannels = 3;
gTexOpts.firstchannel = 0;
gTexOpts.swrap = TextureOpt::WrapPeriodic;
gTexOpts.twrap = TextureOpt::WrapClamp;
gTexOpts.samples = 1;
gTexOpts.mipmode = TextureOpt::MipModeNoMIP;
gTexOpts.interpmode = TextureOpt::InterpClosest; // Force closest texel
gTexOpts.conservative_filter = false;
gTexOpts.sblur = 0;
gTexOpts.tblur = 0;
gTexOpts.swidth = 0;
gTexOpts.twidth = 0;


const Imath::V3f zero(0,0,0);

bool ok = gTexSys->environment(filename, gTexOpts, r, zero, zero, test);

Ryan
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