Packed
Depth caster that packs the fragment's window depth into the RGB channels of an RGBA8 color target (red = high byte, green = middle, blue = low). Used by the sightline depth pass on platforms without hardware depth-compare samplers (earth.worldwind.util.kgl.Kgl.hasShadowSamplers): there receivers read the cube through a plain samplerCube, and sampling a real DEPTH_COMPONENT texture that way is driver-dependent — Adreno 512 returns ~8-bit quantized depth, which collapses the sightline's 1/d depth mapping into kilometre-scale buckets and classified entire scenes occluded (worked at 2.0.5's moment-map color cube, broke at 2.0.6's depth cube). RGBA8 color reads are exact on every GPU. Packing mirrors DepthToColorProgram / DrawContext.readPixelDepth: depth = r + g/255 + b/255^2 on normalized channels.