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Fix split screen + transparent material rendering #24861

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Fix split screen + transparent material rendering #24861

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c8f1b3b
offset by subview viewport
RCoder01 Jul 3, 2026
46bb19b
naming
RCoder01 Jul 4, 2026
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6 changes: 5 additions & 1 deletion crates/bevy_pbr/src/transmission/transmission.wgsl
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Original file line number Diff line number Diff line change
Expand Up @@ -42,7 +42,11 @@ fn specular_transmissive_light(world_position: vec4<f32>, frag_coord: vec3<f32>,
let clip_exit_position = view_bindings::view.clip_from_world * vec4<f32>(exit_position, 1.0);

// Scale / offset position so that coordinate is in right space for sampling transmissive background texture
let offset_position = (clip_exit_position.xy / clip_exit_position.w) * vec2<f32>(0.5, -0.5) + 0.5;
let subview_position = (clip_exit_position.xy / clip_exit_position.w) * vec2<f32>(0.5, -0.5) + 0.5;
let viewport_origin = view_bindings::view.viewport.xy;
let viewport_size = view_bindings::view.viewport.zw;
let full_size = vec2<f32>(textureDimensions(view_bindings::view_transmission_texture));
let offset_position = (subview_position * viewport_size + viewport_origin) / full_size;

// Fetch background color
var background_color: vec4<f32>;
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