Only the wire shaders read transparency_enable; hatch (solid, gradient
and pattern), text and 3D/fill-triangle fragments always drew the
entity's alpha, so turning Show Transparency off left them see-through.
Fixes#1529
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Keep adaptive sampling in both text shaders with compact sampling loops. Validate shader derivatives and existing text rendering, including GPU pipeline creation.
Closes#964
Share source buffers across block placements and render nested content with GPU instance transforms.\n\nChunk silhouettes and compact mesh material data so large drawings stay under device buffer limits and remain responsive.
