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Bug: Multi-frame renders missing output: last frame overwrites previous frame #388

Description

@vaish-gujjari

Describe the bug

When rendering a take with multiple frames in the Showroom Template scene, the output is missing frames. The last frame appears to overwrite previous frames, resulting in fewer output files than expected.

This issue is specific to the Showroom Template scene — other scenes (Font, Product, etc.) produce the correct number of output files.

Expected Behaviour

Output file count should equal the number of frames rendered (e.g., 3 frames → 3 files).

Current Behaviour

Output file count is always one less than the frame count — the final frame overwrites the previous one (e.g., 3 frames → 2 files).

Reproduction Steps

Example-1:

  • Project name: MyProject
  • Output path: _Renders/$prj/$take
  • Takes selected: Take_A
  • Frame range: 0-0 (1 frame)

Expected output files (4 total):

_Renders/MyProject/Take_A_0.exr

Current output files (2 total):

_Renders/MyProject/Take_A_0.exr  

Example-2:

  • Project name: MyProject
  • Output path: _Renders/$prj/$take
  • Takes selected: Take_A
  • Frame range: 0-1 (2 frames)

Expected output files (4 total):

_Renders/MyProject/Take_A_0.exr
_Renders/MyProject/Take_A_1.exr

Current output files (2 total):

_Renders/MyProject/Take_A_0.exr  

Example-3:

  • Project name: MyProject
  • Output path: _Renders/$prj/$take
  • Takes selected: Take_A
  • Frame range: 0-2 (3 frames)

Expected output files (4 total):

_Renders/MyProject/Take_A_0.exr
_Renders/MyProject/Take_A_1.exr
_Renders/MyProject/Take_A_2.exr

Current output files (2 total):

_Renders/MyProject/Take_A_0.exr  
_Renders/MyProject/Take_A_1.exr  

NOTE: This issue is specific to the Showroom Template scene. Other scenes (Font, Product, etc.) generate the expected output correctly.

Environment

At minimum:

  1. Operating system - Windows, Linux
  2. Version of Cinema 4D: 2025
  3. About panel:
submitter_name: Cinema4D
submitter_package_name: deadline-cloud-for-cinema4d
submitter_package_version: 0.9.2
host_application_name: Cinema 4D
host_application_version: '2025303'
additional_info:
    release_date: December 18, 2025
deadline_dep_versions:
    deadline: 0.54.0
    boto3: 1.42.13
    click: 8.3.1
    psutil: 7.2.2
    pyyaml: 6.0.3
    qtpy: 2.4.3
    typing-extensions: 4.15.0
    xxhash: 3.6.0
    pyside6-essentials: 6.10.2
os_name: macOS
os_version: '26.2'
os_architecture: arm64
python_version: 3.11.4
qt_version: 6.10.2

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