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render: never adopt a material's own surface map as streamed ad art

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mchughalex 2026-07-22 14:56:53 +01:00
parent a6efbc9553
commit 5e52ef82e4
1 changed files with 20 additions and 1 deletions
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21
src/skate3_native_scene.cpp
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@ -2430,7 +2430,26 @@ void AdoptDrawFetchOverrides(uint8_t* base, DrawItem& item) {
phys_base(slot3[1]) == phys_base(lm_w1);
// Dimension floor: never adopt a placeholder-sized s4 (an idle ad
// rotation slot) over whatever the channel resolves to.
if (main_pass && (art_w >= 32 || art_h >= 32)) {
//
// Own-channel guard: on families whose s4 carries a surface map
// rather than art (environment.default binds its detail normal map
// there), the stub gate alone is not enough. A material demoted by
// the streamer has a stub-sized diffuse too, and adopting s4 then
// serves the material's OWN detail/spec/normal map as the diffuse
// (distant demoted tree trunks rendered as their flat blue normal
// map). Real event-ad art is never one of the material's own channel
// textures, so any s4 that matches one is a normal binding, not a
// rebind worth adopting.
const auto s4_is_own_channel = [&](uint32_t chan_tex) {
uint32_t own_w1 = 0;
return chan_tex != 0 &&
GuestTryLoadU32(base, chan_tex + 8 * 4, &own_w1) &&
phys_base(slot4[1]) == phys_base(own_w1);
};
const bool s4_is_own = s4_is_own_channel(item.detail_tex) ||
s4_is_own_channel(item.spec_tex) ||
s4_is_own_channel(item.water_normal);
if (main_pass && !s4_is_own && (art_w >= 32 || art_h >= 32)) {
if (item.env_family == 3) {
uint32_t da_w1 = 0;
if (item.decal_art != 0 &&