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Skip additive/mod blend batches in M2 rendering

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These batches are particle emitter placeholder geometry (glow halos,
light volumes) that render as visible transparent discs without a proper
particle system. Skip them entirely instead of attempting to render as
raw mesh geometry.
This commit is contained in:
Kelsi 2026-02-06 08:05:40 -08:00
parent 81b1f87313
commit b9fdc3396d
1 changed files with 8 additions and 11 deletions
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19
src/rendering/m2_renderer.cpp
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@ -1249,6 +1249,11 @@ void M2Renderer::render(const Camera& camera, const glm::mat4& view, const glm::
for (const auto& batch : model.batches) { for (const auto& batch : model.batches) {
if (batch.indexCount == 0) continue; if (batch.indexCount == 0) continue;
// Skip additive/mod blend batches (glow halos, particle placeholders)
// These need a particle system to render properly; as raw geometry
// they appear as visible transparent discs.
if (batch.blendMode >= 3) continue;
// Compute UV offset for texture animation // Compute UV offset for texture animation
glm::vec2 uvOffset(0.0f, 0.0f); glm::vec2 uvOffset(0.0f, 0.0f);
if (batch.textureAnimIndex != 0xFFFF && model.hasTextureAnimation) { if (batch.textureAnimIndex != 0xFFFF && model.hasTextureAnimation) {
@ -1306,14 +1311,9 @@ void M2Renderer::render(const Camera& camera, const glm::mat4& view, const glm::
glDepthMask(GL_FALSE); glDepthMask(GL_FALSE);
} }
// Disable depth testing entirely for additive/mod blends (glow, light halos)
bool disableDepth = (batch.blendMode >= 3);
if (disableDepth) {
glDisable(GL_DEPTH_TEST);
}
// Unlit: material flag 0x01 or additive/mod blend modes // Unlit: material flag 0x01
bool unlit = (batch.materialFlags & 0x01) != 0 || batch.blendMode >= 3; bool unlit = (batch.materialFlags & 0x01) != 0;
shader->setUniform("uUnlit", unlit); shader->setUniform("uUnlit", unlit);
bool hasTexture = (batch.texture != 0); bool hasTexture = (batch.texture != 0);
@ -1329,10 +1329,7 @@ void M2Renderer::render(const Camera& camera, const glm::mat4& view, const glm::
glDrawElements(GL_TRIANGLES, batch.indexCount, GL_UNSIGNED_SHORT, glDrawElements(GL_TRIANGLES, batch.indexCount, GL_UNSIGNED_SHORT,
(void*)(batch.indexStart * sizeof(uint16_t))); (void*)(batch.indexStart * sizeof(uint16_t)));
// Restore depth test, depth writes, and blend func after transparent batch // Restore depth writes and blend func after transparent batch
if (disableDepth) {
glEnable(GL_DEPTH_TEST);
}
if (batchTransparent && fadeAlpha >= 1.0f) { if (batchTransparent && fadeAlpha >= 1.0f) {
glDepthMask(GL_TRUE); glDepthMask(GL_TRUE);
} }