fixes

Author: dvicini

include/mitsuba/render/interaction.h

@@ -169,7 +169,7 @@ struct Interaction {
     Point3f offset_p(const Vector3f &d) const {
         Float mag = (1.f + dr::max(dr::abs(p))) * math::RayEpsilon<Float>;
         mag = dr::detach(dr::mulsign(mag, dr::dot(n, d)));
-        return dr::fmadd(mag, dr::detach(n), p + ray_offset);
+        return dr::fmadd(mag, dr::detach(n), p + dr::detach(ray_offset));
     }
 };
 
@@ -759,7 +759,9 @@ std::ostream &operator<<(std::ostream &os, const Interaction<Float, Spectrum> &i
            << "  t = " << it.t << "," << std::endl
            << "  time = " << it.time << "," << std::endl
            << "  wavelengths = " << it.wavelengths << "," << std::endl
-           << "  p = " << string::indent(it.p, 6) << std::endl
+           << "  p = " << string::indent(it.p, 6) << "," << std::endl
+           << "  ray_offset = " << string::indent(it.ray_offset, 15) << "," << std::endl
+           << "  n = " << string::indent(it.n, 6) << std::endl
            << "]";
     }
     return os;

src/render/mesh.cpp

@@ -1561,7 +1561,7 @@ Mesh<Float, Spectrum>::compute_surface_interaction(const Ray3f &ray,
               dot2 = dr::maximum(dr::dot(tmp2, n2), 0.f);
         si.ray_offset =
             m_ray_offset_scale *
-            dr::fmadd(b0, dot0 * n0, dr::fmadd(b1, dot1 * n1, b2 * dot2 * n2));
+            dr::detach(dr::fmadd(b0, dot0 * n0, dr::fmadd(b1, dot1 * n1, b2 * dot2 * n2)));
     }
 
     if (m_flip_normals) {

src/render/python/interaction_v.cpp

@@ -31,7 +31,7 @@ MI_PY_EXPORT(Interaction) {
         .def("zero_",        &Interaction3f::zero_, D(Interaction, zero))
         .def_repr(Interaction3f);
 
-    MI_PY_DRJIT_STRUCT(it, Interaction3f, t, time, wavelengths, p, n)
+    MI_PY_DRJIT_STRUCT(it, Interaction3f, t, time, wavelengths, p, ray_offset, n)
 }
 
 MI_PY_EXPORT(SurfaceInteraction) {
@@ -92,7 +92,7 @@ MI_PY_EXPORT(SurfaceInteraction) {
             D(SurfaceInteraction, has_n_partials))
         .def_repr(SurfaceInteraction3f);
 
-    MI_PY_DRJIT_STRUCT(si, SurfaceInteraction3f, t, time, wavelengths, p, n,
+    MI_PY_DRJIT_STRUCT(si, SurfaceInteraction3f, t, time, wavelengths, p, ray_offset, n,
                        shape, uv, sh_frame, dp_du, dp_dv, dn_du, dn_dv, duv_dx,
                        duv_dy, wi, prim_index, instance)
 }
@@ -119,7 +119,7 @@ MI_PY_EXPORT(MediumInteraction) {
         .def("to_local", &MediumInteraction3f::to_local, "v"_a, D(MediumInteraction, to_local))
         .def_repr(MediumInteraction3f);
 
-    MI_PY_DRJIT_STRUCT(mi, MediumInteraction3f, t, time, wavelengths, p, n,
+    MI_PY_DRJIT_STRUCT(mi, MediumInteraction3f, t, time, wavelengths, p, ray_offset, n,
                        medium, sh_frame, wi, sigma_s, sigma_n, sigma_t,
                        combined_extinction, mint)
 }