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Fix shadow artifacts by employing hardware clamping #7532

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Merged
BMagnu merged 1 commit into from
Jun 17, 2026
+4 −3
Merged

Fix shadow artifacts by employing hardware clamping #7532

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3 changes: 0 additions & 3 deletions code/def_files/data/effects/main-g.sdr
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Original file line number Diff line number Diff line change
Expand Up @@ -163,9 +163,6 @@ out VertexOutput {
gl_Position = shadow_proj_matrix[instanceID] * gl_in[vert].gl_Position;
#prereplace ENDIF_FLAG //MODEL_SDR_FLAG_TRANSFORM

if(gl_Position.z < -1.0)
gl_Position.z = -1.0;

vertOut.position = gl_in[vert].gl_Position;
vertOut.normal = vertIn[vert].normal;
vertOut.texCoord = vertIn[vert].texCoord;
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4 changes: 4 additions & 0 deletions code/graphics/opengl/gropengltnl.cpp
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Expand Up @@ -697,6 +697,8 @@ void gr_opengl_shadow_map_start(matrix4 *shadow_view_matrix, const matrix *light
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

glEnable(GL_DEPTH_CLAMP);

Rendering_to_shadow_map = true;
Glowpoint_override_save = Glowpoint_override;
Glowpoint_override = true;
Expand All @@ -715,6 +717,8 @@ void gr_opengl_shadow_map_end()
if(!Rendering_to_shadow_map)
return;

glDisable(GL_DEPTH_CLAMP);

gr_end_view_matrix();
Rendering_to_shadow_map = false;

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