Merge pull request #26839 from toasteater/fix/keep-linear

Respect keep_3d_linear when transparent_bg is on.

drivers/gles3/rasterizer_scene_gles3.cpp

@@ -3667,7 +3667,7 @@ void RasterizerSceneGLES3::_post_process(Environment *env, const CameraMatrix &p
 		}
 		glActiveTexture(GL_TEXTURE0);
 		glBindTexture(GL_TEXTURE_2D, storage->frame.current_rt->effects.mip_maps[0].color);
-		storage->shaders.copy.set_conditional(CopyShaderGLES3::LINEAR_TO_SRGB, true);
+		storage->shaders.copy.set_conditional(CopyShaderGLES3::LINEAR_TO_SRGB, !storage->frame.current_rt->flags[RasterizerStorage::RENDER_TARGET_KEEP_3D_LINEAR]);
 		storage->shaders.copy.set_conditional(CopyShaderGLES3::V_FLIP, storage->frame.current_rt->flags[RasterizerStorage::RENDER_TARGET_VFLIP]);
 		storage->shaders.copy.set_conditional(CopyShaderGLES3::DISABLE_ALPHA, !storage->frame.current_rt->flags[RasterizerStorage::RENDER_TARGET_TRANSPARENT]);
 		storage->shaders.copy.bind();