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-rw-r--r--servers/rendering/renderer_viewport.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/servers/rendering/renderer_viewport.cpp b/servers/rendering/renderer_viewport.cpp
index 80c1f67d8a..10e295ab04 100644
--- a/servers/rendering/renderer_viewport.cpp
+++ b/servers/rendering/renderer_viewport.cpp
@@ -899,6 +899,7 @@ void RendererViewport::viewport_set_use_xr(RID p_viewport, bool p_use_xr) {
void RendererViewport::viewport_set_scaling_3d_mode(RID p_viewport, RS::ViewportScaling3DMode p_mode) {
Viewport *viewport = viewport_owner.get_or_null(p_viewport);
ERR_FAIL_NULL(viewport);
+ ERR_FAIL_COND_EDMSG(p_mode == RS::VIEWPORT_SCALING_3D_MODE_FSR && OS::get_singleton()->get_current_rendering_method() != "forward_plus", "FSR1 is only available when using the Forward+ renderer.");
ERR_FAIL_COND_EDMSG(p_mode == RS::VIEWPORT_SCALING_3D_MODE_FSR2 && OS::get_singleton()->get_current_rendering_method() != "forward_plus", "FSR2 is only available when using the Forward+ renderer.");
if (viewport->scaling_3d_mode == p_mode) {