2 Commits

Author	SHA1	Message	Date
maj00r	20cf81b362	fix(shaders): parallax mapping reads its depth from a mip about four texels per pixel coarser, filtered bicubically where the hit is refined, so the relief no longer breaks into stalactites and the edges of stones no longer step along the texel grid of the compressed depth; it takes 16 to 64 layers by the angle of view and six steps of refinement, casts the shadows of the relief from the sun over the sun light and darkens the hollows deeper than the mean depth of the texture while lightening the tops, so the mean brightness of a surface stays the same	2026-10-14 15:02:14 +02:00
maj00r	3d6a465570	fix(shaders): parallax mapping of the opengl33 materials is shared by the four parallax shaders in parallax.glsl and samples its depth with the gradients of the surface instead of letting a loop of varying length pick the mip level, picks the number of layers by the angle of view alone and refines the hit with a binary search instead of one linear step, so stones near the camera no longer show combs of layer slices; it fades out between 60 and 100 m instead of stopping at a hard line and fades out at grazing angles, and the simple offset without extra effects no longer divides by an unbounded cosine of the view	2026-10-14 14:23:52 +02:00