Merge pull request #64225 from Calinou/3d-scaling-bilinear-use-negative-mipmap-bias

1 files changed, 5 insertions, 1 deletions

diff --git a/servers/rendering/renderer_viewport.cpp b/servers/rendering/renderer_viewport.cpp
index 118bf532b3..73b03966c5 100644
--- a/servers/rendering/renderer_viewport.cpp
+++ b/servers/rendering/renderer_viewport.cpp
@@ -138,7 +138,11 @@ void RendererViewport::_configure_3d_render_buffers(Viewport *p_viewport) {
 
 			p_viewport->internal_size = Size2(render_width, render_height);
 
-			RSG::scene->render_buffers_configure(p_viewport->render_buffers, p_viewport->render_target, render_width, render_height, width, height, p_viewport->fsr_sharpness, p_viewport->texture_mipmap_bias, p_viewport->msaa, p_viewport->screen_space_aa, p_viewport->use_taa, p_viewport->use_debanding, p_viewport->get_view_count());
+			// At resolution scales lower than 1.0, use negative texture mipmap bias
+			// to compensate for the loss of sharpness.
+			const float texture_mipmap_bias = log2f(MIN(scaling_3d_scale, 1.0)) + p_viewport->texture_mipmap_bias;
+
+			RSG::scene->render_buffers_configure(p_viewport->render_buffers, p_viewport->render_target, render_width, render_height, width, height, p_viewport->fsr_sharpness, texture_mipmap_bias, p_viewport->msaa, p_viewport->screen_space_aa, p_viewport->use_taa, p_viewport->use_debanding, p_viewport->get_view_count());
 		}
 	}
 }