Hi Fred,
I found the correct extension for unsigned uniforms:
--- a/src/Main/CameraGroup.cxx
+++ b/src/Main/CameraGroup.cxx
@@ -906,6 +906,7 @@ const char *ssao_vert_src = ""
const char *ssao_frag_src = ""
"#version 120\n"
+ "#extension GL_EXT_gpu_shader4 : enable\n"
"#line " TOSTRING(__LINE__) " 2\n"
"uniform sampler2D normal_tex;\n"
"uniform sampler2D depth_tex;\n"
Greetings,
Olaf
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