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Stabilize foliage shadows and smooth motion transitions

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- keep shadow projection center fixed while moving to remove per-frame projection churn flicker

- replace delayed post-move catch-up with immediate stop transition and idle smoothing

- rework foliage shadow caster motion to use blended phase-shifted UV samples for continuous position transitions

- reduce high-frequency foliage threshold popping by removing threshold warping path

- sharpen terrain receive filtering with tuned 5-tap PCF weights/offset for more detailed shadows

- raise shadow map resolution to 1536 and keep light-space texel snapping for stable sampling

- set shadows enabled by default and lower global shadow strength from 0.65 to 0.62

- keep foliage animation speed consistent between moving and idle at 80%
This commit is contained in:
Kelsi 2026-02-21 02:23:08 -08:00
parent 1003b25ff4
commit 7717ab8d6b
8 changed files with 111 additions and 54 deletions
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13
src/rendering/m2_renderer.cpp
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@ -1050,6 +1050,7 @@ bool M2Renderer::loadModel(const pipeline::M2Model& model, uint32_t modelId) {
}
}
gpuModel.disableAnimation = foliageOrTreeLike || chestName;
gpuModel.shadowWindFoliage = foliageOrTreeLike;
gpuModel.isGroundDetail = groundDetailModel;
if (groundDetailModel) {
// Ground clutter (grass/pebbles/detail cards) should never block camera/movement.
@ -1871,7 +1872,7 @@ void M2Renderer::render(const Camera& camera, const glm::mat4& view, const glm::
shader->setUniform("uFogEnd", fogEnd);
bool useShadows = shadowEnabled;
shader->setUniform("uShadowEnabled", useShadows ? 1 : 0);
shader->setUniform("uShadowStrength", 0.65f);
shader->setUniform("uShadowStrength", 0.62f);
if (useShadows) {
shader->setUniform("uLightSpaceMatrix", lightSpaceMatrix);
glActiveTexture(GL_TEXTURE7);
@ -2357,14 +2358,14 @@ void M2Renderer::renderShadow(GLuint shadowShaderProgram, const glm::vec3& shado
GLint useTexLoc = glGetUniformLocation(shadowShaderProgram, "uUseTexture");
GLint texLoc = glGetUniformLocation(shadowShaderProgram, "uTexture");
GLint alphaTestLoc = glGetUniformLocation(shadowShaderProgram, "uAlphaTest");
GLint opacityLoc = glGetUniformLocation(shadowShaderProgram, "uShadowOpacity");
GLint foliageSwayLoc = glGetUniformLocation(shadowShaderProgram, "uFoliageSway");
if (modelLoc < 0) {
return;
}
if (useTexLoc >= 0) glUniform1i(useTexLoc, 0);
if (alphaTestLoc >= 0) glUniform1i(alphaTestLoc, 0);
if (opacityLoc >= 0) glUniform1f(opacityLoc, 1.0f);
if (foliageSwayLoc >= 0) glUniform1i(foliageSwayLoc, 0);
if (texLoc >= 0) glUniform1i(texLoc, 0);
glActiveTexture(GL_TEXTURE0);
@ -2388,13 +2389,11 @@ void M2Renderer::renderShadow(GLuint shadowShaderProgram, const glm::vec3& shado
if (batch.indexCount == 0) continue;
bool useTexture = (batch.texture != 0);
bool alphaCutout = batch.hasAlpha;
// Foliage/leaf cutout batches cast softer shadows than opaque trunk geometry.
float shadowOpacity = alphaCutout ? 0.55f : 1.0f;
bool foliageSway = model.shadowWindFoliage && alphaCutout;
if (useTexLoc >= 0) glUniform1i(useTexLoc, useTexture ? 1 : 0);
if (alphaTestLoc >= 0) glUniform1i(alphaTestLoc, alphaCutout ? 1 : 0);
if (opacityLoc >= 0) glUniform1f(opacityLoc, shadowOpacity);
if (foliageSwayLoc >= 0) glUniform1i(foliageSwayLoc, foliageSway ? 1 : 0);
if (useTexture) {
glBindTexture(GL_TEXTURE_2D, batch.texture);
}