Undo #25557 (was not right anyway), fixes #26258

drivers/gles3/rasterizer_scene_gles3.cpp

@@ -2349,10 +2349,6 @@ void RasterizerSceneGLES3::_add_geometry_with_material(RasterizerStorageGLES3::G
 		state.used_screen_texture = true;
 	}
 
-	if (p_material->shader->spatial.uses_depth_texture) {
-		state.used_depth_texture = true;
-	}
-
 	if (p_depth_pass) {
 
 		if (has_blend_alpha || p_material->shader->spatial.uses_depth_texture || (has_base_alpha && p_material->shader->spatial.depth_draw_mode != RasterizerStorageGLES3::Shader::Spatial::DEPTH_DRAW_ALPHA_PREPASS) || p_material->shader->spatial.depth_draw_mode == RasterizerStorageGLES3::Shader::Spatial::DEPTH_DRAW_NEVER || p_material->shader->spatial.no_depth_test)
@@ -3169,7 +3165,7 @@ void RasterizerSceneGLES3::_fill_render_list(InstanceBase **p_cull_result, int p
 	current_material_index = 0;
 	state.used_sss = false;
 	state.used_screen_texture = false;
-	state.used_depth_texture = false;
+
 	//fill list
 
 	for (int i = 0; i < p_cull_count; i++) {
@@ -3634,7 +3630,6 @@ void RasterizerSceneGLES3::_post_process(Environment *env, const CameraMatrix &p
 
 	if (storage->frame.current_rt->buffers.active) {
 		//transfer to effect buffer if using buffers, also resolve MSAA
-		glReadBuffer(GL_COLOR_ATTACHMENT0);
 		glBindFramebuffer(GL_READ_FRAMEBUFFER, storage->frame.current_rt->buffers.fbo);
 		glBindFramebuffer(GL_DRAW_FRAMEBUFFER, storage->frame.current_rt->effects.mip_maps[0].sizes[0].fbo);
 		glBlitFramebuffer(0, 0, storage->frame.current_rt->width, storage->frame.current_rt->height, 0, 0, storage->frame.current_rt->width, storage->frame.current_rt->height, GL_COLOR_BUFFER_BIT, GL_NEAREST);
@@ -4191,7 +4186,7 @@ void RasterizerSceneGLES3::render_scene(const Transform &p_cam_transform, const
 
 		glColorMask(1, 1, 1, 1);
 
-		if (state.used_contact_shadows || state.used_depth_texture) {
+		if (state.used_contact_shadows) {
 
 			glBindFramebuffer(GL_READ_FRAMEBUFFER, storage->frame.current_rt->buffers.fbo);
 			glReadBuffer(GL_COLOR_ATTACHMENT0);

drivers/gles3/rasterizer_scene_gles3.h

@@ -204,7 +204,7 @@ public:
 		bool cull_disabled;
 		bool used_sss;
 		bool used_screen_texture;
-		bool used_depth_texture;
+
 		bool used_depth_prepass;
 		bool used_depth_prepass_and_resolved;