Increase the tonemap White value to make highlights less blown out

This incorporates settings from
https://github.com/godotengine/godot/pull/34798 into the TPS demo.

The exposure was increased to make up for the overall darker scene.

Glow settings were also changed to make glow less strong.

level/geometry/environment.tres

@@ -14,6 +14,8 @@ fog_height_enabled = true
 fog_height_max = -200.0
 fog_height_curve = 0.812252
 tonemap_mode = 2
+tonemap_exposure = 1.2
+tonemap_white = 6.0
 auto_exposure_scale = 0.08
 auto_exposure_min_luma = 0.01
 auto_exposure_max_luma = 16.0
@@ -31,9 +33,9 @@ glow_levels/3 = false
 glow_levels/4 = true
 glow_levels/7 = true
 glow_intensity = 0.1
-glow_bloom = 0.2
 glow_blend_mode = 1
-glow_hdr_threshold = 0.7
+glow_hdr_threshold = 0.9
+glow_hdr_luminance_cap = 3.0
 glow_bicubic_upscale = true
 adjustment_enabled = true
 adjustment_brightness = 1.48